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| P0299, p1250 http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=62740 |
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| Author: | Kgeisler2010 [ Tue Sep 20, 2011 2:01 pm ] |
| Post subject: | P0299, p1250 |
Ok ive had two codes p0299 and p1250 since i bought the liberty to see what kind of boost i was getting i got a boost gauge. It showed im only getring 14 pounds of boost max. Assuming it was the cac hoses i swapped them out with some samcos. But im still only seeing a max of 14 pounds. Could the low boost be caused by the egr valve and will the gde tune help. My gde flash tool is suppose to be here tommorow. |
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| Author: | papaindigo [ Tue Sep 20, 2011 3:43 pm ] |
| Post subject: | Re: P0299, p1250 |
Those codes strongly suggest you have a boost pressure solenoid issue. There is a way to bypass that solenoid to see if it's your problem, when bypassed your boost should go back to normal but the CEL won't go away until the solenoid is replaced although it doesn't cost much. There is or was a picture on the forum on what hoses to move but I cannot find it just now. GDE's writeup on this says "By-passing of the on/off solenoid is very straight forward. Trace the vacuum line output from the black plastic reservoir to the input of the on/off solenoid. Remove this vacuum line and plug it directly into the turbo EVM on the port labeled "VAC". The turbo EVM is the one with the blue rubber isolator and vacuum line running directly to turbo." The "black plastic reservoir" refers to the vacuum reservoir located just behind the air box. Note though that the P0299 code may also be due to a collapsed/melted vacuum line between the vacuum reservoir and the firewall behind/under the plastic water tank. There is at least one report of that line contacting a hot metal part and collapsing/melting (viewtopic.php?f=5&t=61240) |
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| Author: | Kgeisler2010 [ Tue Sep 20, 2011 5:03 pm ] |
| Post subject: | Re: P0299, p1250 |
Thanks for the help. ill try that after i get off work tonight. |
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| Author: | Kgeisler2010 [ Wed Sep 21, 2011 12:13 am ] |
| Post subject: | Re: P0299, p1250 |
Well that was definately it. Thanks again for the help! |
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