LOST JEEPS :: View topic - i know, i know, *another question*

Could you mean "Turbo Lag"? That would be the delay when throttling hard from a stop. There are mods to that helps but not get rid of all together. The turbo has to spool up to make power and won't until there enough exhaust pressure to spin the turbo up.

i have been told that the delay is due to the drive by wire and not a cable that causes thus issue

05infernoCRDL wrote:

i have been told that the delay is due to the drive by wire and not a cable that causes thus issue

The drive by wire has nothing to do with it.

Possible ways to reduce turbo lag:

1. Improve engine breathing by ditching the factory exhaust system to reduce backpressure on the turbo (Cat back system is a proven performance improvement).
2. Improve engine breathing by modifying the air intake side to get more air into the turbo: less restrictive filter elements, air box mods, etc.

Note: The limiting factor in breathing improvements will be the turbo intake and exhaust port dimensions. There is no point in putting a 3" or 4" exhaust system on a Liberty CRD. Likewide putting big tuned intake pipes on in front of the turbo is not going to improve performance. It's all about reducing the restrictions that might be in the system now: mufflers, filters, etc.

Thanx for the info. I am runnin mopar air filters and still have the stock exhaust. Once i get the ok from my hubby i am goin to do away with the muffler. I haven't decided if i am goin to put a flowmaster or something back on or if i will just add a piece of pipe (which would be cheapest).
I'm not sure if i will change air filters or not because i am not sure what else to run, i was told K&N was a BIG NO NO! My husband is runnin a S&B Cold air intake but they currently don't offer a filter for mine. I know that i already have a cold air intake and i thinkin strongly of doin the V-6 air box mod

kntrygurl wrote:

I've got to where I enjoy flooring it at an on ramp or pulling away from a light, then having the second or two of anticipation before the rocket takes off :twisted:

Threeweight wrote:

kntrygurl wrote:

I've got to where I enjoy flooring it at an on ramp or pulling away from a light, then having the second or two of anticipation before the rocket takes off :twisted:

I know exactly what you are talkin about!!!! Or when you sittin in the turn lane and see an openin to get over and when you hit the petal it justs sits there and leaves you wonderin if you gonna make it. :twisted:

Glend wrote:

Author:	kntrygurl [ Mon Nov 10, 2008 11:45 pm ]
Post subject:	i know, i know, another question
ok. i may be the dumbest person ever but i have been searchin for the last month or so and i can not find anything about the throttle delay. Does anyone know a way i can stop this or at least make it not so bad. Please don't be to harsh on me. LOL

Author:	BlackLibertyCRD [ Mon Nov 10, 2008 11:49 pm ]
Post subject:
Could you mean "Turbo Lag"? That would be the delay when throttling hard from a stop. There are mods to that helps but not get rid of all together. The turbo has to spool up to make power and won't until there enough exhaust pressure to spin the turbo up.

Author:	kntrygurl [ Mon Nov 10, 2008 11:59 pm ]
Post subject:
BlackLibertyCRD wrote: Could you mean "Turbo Lag"? That would be the delay when throttling hard from a stop. There are mods to that helps but not get rid of all together. The turbo has to spool up to make power and won't until there enough exhaust pressure to spin the turbo up. yeah it could be that. I have been drivin the jeep for about 9 months now and i am used to it or at least i thought i was until i stepped into my husbands 07 dodge dually with the 5.9 in it. It didn't have the delay that the lil jeep has. i guess that could be why he is always tellin me that he don't like to drive it.

Author:	Uffe [ Tue Nov 11, 2008 2:59 am ]
Post subject:
There's also a delay when you put it into park and tap the throttle. Not sure that qualifies as turbo lag as well, but the TDI got it too.

Author:	05infernoCRDL [ Tue Nov 11, 2008 3:20 pm ]
Post subject:
i have been told that the delay is due to the drive by wire and not a cable that causes thus issue

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Author:	aandlwoods [ Tue Nov 11, 2008 5:57 pm ]
Post subject:
If you do the SEGR it will help the turbo-lag considerably.

Author:	Sir Sam [ Tue Nov 11, 2008 6:08 pm ]
Post subject:
05infernoCRDL wrote: i have been told that the delay is due to the drive by wire and not a cable that causes thus issue The drive by wire has nothing to do with it.

Author:	BlackLibertyCRD [ Tue Nov 11, 2008 6:20 pm ]
Post subject:
Sir Sam wrote: 05infernoCRDL wrote: i have been told that the delay is due to the drive by wire and not a cable that causes thus issue The drive by wire has nothing to do with it. I think what he means is the throttle will delay by the programming of the ECM to prevent black smoke during jack rabbit take off from the light. An emission thing us diesel guys don't understand,

Author:	Glend [ Tue Nov 11, 2008 6:45 pm ]
Post subject:	Turbo Lag solutions
Possible ways to reduce turbo lag: 1. Improve engine breathing by ditching the factory exhaust system to reduce backpressure on the turbo (Cat back system is a proven performance improvement). 2. Improve engine breathing by modifying the air intake side to get more air into the turbo: less restrictive filter elements, air box mods, etc. Note: The limiting factor in breathing improvements will be the turbo intake and exhaust port dimensions. There is no point in putting a 3" or 4" exhaust system on a Liberty CRD. Likewide putting big tuned intake pipes on in front of the turbo is not going to improve performance. It's all about reducing the restrictions that might be in the system now: mufflers, filters, etc.

Author:	kntrygurl [ Tue Nov 11, 2008 7:02 pm ]
Post subject:	Re: Turbo Lag solutions
Glend wrote: Possible ways to reduce turbo lag: 1. Improve engine breathing by ditching the factory exhaust system to reduce backpressure on the turbo (Cat back system is a proven performance improvement). 2. Improve engine breathing by modifying the air intake side to get more air into the turbo: less restrictive filter elements, air box mods, etc. Note: The limiting factor in breathing improvements will be the turbo intake and exhaust port dimensions. There is no point in putting a 3" or 4" exhaust system on a Liberty CRD. Likewide putting big tuned intake pipes on in front of the turbo is not going to improve performance. It's all about reducing the restrictions that might be in the system now: mufflers, filters, etc. Thanx for the info. I am runnin mopar air filters and still have the stock exhaust. Once i get the ok from my hubby i am goin to do away with the muffler. I haven't decided if i am goin to put a flowmaster or something back on or if i will just add a piece of pipe (which would be cheapest). I'm not sure if i will change air filters or not because i am not sure what else to run, i was told K&N was a BIG NO NO! My husband is runnin a S&B Cold air intake but they currently don't offer a filter for mine. I know that i already have a cold air intake and i thinkin strongly of doin the V-6 air box mod

Author:	warp2diesel [ Tue Nov 11, 2008 7:46 pm ]
Post subject:	Some other tricks
The Pro-guard 7 has more surface area and will help a little on free breathing. The V6 air box mod will help keep out the rain when you are having a strong rain, when filters get wet, they don't flow air very well. ORM/SEGR will help a lot by shutting off the EGR valve and upping the oxygen level in the air intake. Just unplug the MAF on the top of the air filter and ignore the CEL until you can get the SEGR installed. The diesel knock will be a little louder, but then you won't have to worry about running into wildlife as much when you are on the back roads. I love watching the Canada Geese run from my CRD and just block the road for the gassers Fuel cooler will help in hot weather when the fuel temp goes up and the ECM cuts back on the FUEL. If your Hubbies Cummins has the Common Rail injection system this will help his as well. Since you live in LA, unplug the fuel heater and don't plug it in until you go North of the Mason Dixon line in the sub zero Winter. I have done the mods I listed and a few more on my signature. With the stock muffler I can be through the intersection before a big Block Taho can even get to the middle. When the road is wet, I slip my CRD into part time 4X4 and laugh as I watch them sit and spin. I can blow away Gasser Liberty's too. CRD torque is great Train your foot to make the most of it. Is the Magnaflo (I prefer Stainless Steel) on my list, yes, but the Red Head has stuff on her list too. To be very honest, the restriction is more of a problem when the boost is up for trailer towing than commuting to and from the airports. Air in the fuel line can cause a little stumble too (before it dies from air in the fuel), lift pump is the permanent fix. Steve

Author:	msilbernagel [ Wed Nov 12, 2008 3:30 pm ]
Post subject:
Another source of throttle delay is air in the fuel system. The stock system pulls a vacuum from the CP3 (high-pressure pump mounted to the engine) back to the tank, and the snap fittings between the fuel filter and the tank begin to leak with very little suction. They seem to have been designed for light pressurization... So, between the air getting in and normal air from sloshing around in the tank (etc) it accumulates at the highest point in the system, the fuel filter head, and occasionally builds to the point where the engine seems to go into a kind of limp mode. Lesser degrees include smoking, stumbling, missing, and degraded throttle response. Naturally, it worsens as the filter fills with debris. The air in the system may also make the fuel-heater vulnerable to melting the power fitting on the head.. with attendant air intake and fuel outflow, not to mention the fire hazard. Those things, a notably the throttle response delays, went away when I put the in-tank module/pump from the Ram P.U. into the Jeep. Others use an external fuel pump with similar results - some of them have hose-clamped those snap fittings to reduce the air leakage on the vacuum side prior to the external pump. Mark

Author:	Threeweight [ Wed Nov 12, 2008 3:31 pm ]
Post subject:	Re: Turbo Lag solutions
kntrygurl wrote: Thanx for the info. I am runnin mopar air filters and still have the stock exhaust. Once i get the ok from my hubby i am goin to do away with the muffler. I haven't decided if i am goin to put a flowmaster or something back on or if i will just add a piece of pipe (which would be cheapest). I'm not sure if i will change air filters or not because i am not sure what else to run, i was told K&N was a BIG NO NO! My husband is runnin a S&B Cold air intake but they currently don't offer a filter for mine. I know that i already have a cold air intake and i thinkin strongly of doin the V-6 air box mod I've done all those mods and still have turbo lag (though its better). NAPA (Wix) air filters are another option, much more pleats than Mopar and better filtration, plus they are cheap. Took me a while to get used to driving a turbo charged vehicle again. At the end of the day, we've got a fairly small engine trying to move a fairly heavy truck. Read some of the threads from folks who have had a turbo hose split, leaving them with no boost... turns the little Jeep into a slug (albeit a very high torque slug). I've got to where I enjoy flooring it at an on ramp or pulling away from a light, then having the second or two of anticipation before the rocket takes off

Author:	dgeist [ Wed Nov 12, 2008 3:41 pm ]
Post subject:	Cleaned the Manifold boost pressure (referred to as MAP) yet
I don't know if it was psychological or not, but my lag seemed to decrease just after I cleaned my sensor of the sludge that was covering it. I could see where inaccurate boost pressure readings could cause some lag as a "compensation" method. Dan

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Author:	Zonie [ Wed Nov 12, 2008 3:42 pm ]
Post subject:
I've done every mod recommended to get rid of turbo lag. The air filter seemed to be the one thing that made the most difference. The WIX filter is head and shoulders above the Mopar, however these need to be changed about every 3K to keep the lag at a minimum. I then tried the Amsoil Eaa filter ($44.) which is easily cleaned with compressed air and filters efficiently for 25K (as evidenced by oil analysis). I can even tell when it needs to be cleaned by how smooth the take off is from a stop.

Author:	ATXKJ [ Wed Nov 12, 2008 5:25 pm ]
Post subject:
most folks with performance modules mention the lag goes away.

Author:	Joe Romas [ Wed Nov 12, 2008 5:26 pm ]
Post subject:
I've got both the Amsoil air filter and Cummins in tank fuel pump and 90% of my lag is gone

Author:	kntrygurl [ Thu Nov 13, 2008 1:37 am ]
Post subject:	Re: Turbo Lag solutions
Threeweight wrote: kntrygurl wrote: I've got to where I enjoy flooring it at an on ramp or pulling away from a light, then having the second or two of anticipation before the rocket takes off I know exactly what you are talkin about!!!! Or when you sittin in the turn lane and see an openin to get over and when you hit the petal it justs sits there and leaves you wonderin if you gonna make it.

Author:	Joe Romas [ Thu Nov 13, 2008 8:46 am ]
Post subject:	Re: Turbo Lag solutions
kntrygurl wrote: Threeweight wrote: kntrygurl wrote: I've got to where I enjoy flooring it at an on ramp or pulling away from a light, then having the second or two of anticipation before the rocket takes off I know exactly what you are talkin about!!!! Or when you sittin in the turn lane and see an openin to get over and when you hit the petal it justs sits there and leaves you wonderin if you gonna make it. As a test try bleeding the air out of the filter head and then taking it for a spin The amount of hesitation on mine would vary with too many unpredictables situations. Once after refilling it ran like a rocket and I thought it was the new at the time ULSD but it soon regressed. Another time after refilling I was turning left out of a service station and as the traffic came barreling down on me it felt more like five minutes.

Author:	tulsa [ Thu Nov 13, 2008 9:20 am ]
Post subject:	Re: Turbo Lag solutions
kntrygurl wrote: Glend wrote: Possible ways to reduce turbo lag: 1. Improve engine breathing by ditching the factory exhaust system to reduce backpressure on the turbo (Cat back system is a proven performance improvement). 2. Improve engine breathing by modifying the air intake side to get more air into the turbo: less restrictive filter elements, air box mods, etc. Note: The limiting factor in breathing improvements will be the turbo intake and exhaust port dimensions. There is no point in putting a 3" or 4" exhaust system on a Liberty CRD. Likewide putting big tuned intake pipes on in front of the turbo is not going to improve performance. It's all about reducing the restrictions that might be in the system now: mufflers, filters, etc. Thanx for the info. I am runnin mopar air filters and still have the stock exhaust. Once i get the ok from my hubby i am goin to do away with the muffler. I haven't decided if i am goin to put a flowmaster or something back on or if i will just add a piece of pipe (which would be cheapest). I'm not sure if i will change air filters or not because i am not sure what else to run, i was told K&N was a BIG NO NO! My husband is runnin a S&B Cold air intake but they currently don't offer a filter for mine. I know that i already have a cold air intake and i thinkin strongly of doin the V-6 air box mod There will be nothing lost by trying a straight pipe first. I have an Aero 2525 I got off Ebay for $101 delivered. It helped, but I think the straight pipe is the best solution.