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Re: o.k. guys I need some help...(Jak or others)
Posted by Andrew Prescott [Email] (more from Andrew Prescott) on Sun, 18 Nov 2007 16:20:32
In Reply to: o.k. guys I need some help...(Jak or others), a12, Sun, 18 Nov 2007 14:53:16
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So you have a "lean, random misfire, MAP, and O2 performance". All these dtc's are probably caused by one problem. The P0300 is caused by P0171,1171, I would'nt be concerened with those two. But the P0106 is where you should focus on. The 02 code is set because trionic cant control the AFR. I bet you have a vacuum issue, connect a vacuum gauge to the intake (below throttle plate) should be around 18in hg, if fluctuating run a compression test on all cylinders (possable burnt valve/low compression issue) Try crimping off the IAC for possable sticking issue. You could have a serious vacuum leak somewhere between the intake mounting, or the brake booster may not be holding vacuum. Dissconnect the brake booster, plug the line off in the intake then re test. If runs smoother than its leaking. Spray carb-cleaner around the intake, when the idle rises the leak is found. I hope this helps.
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