Question about 1997 GMC Safari

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I changed the intake manifold on my 1997 gmc safari van that has the 4.3L engine because of a coolant leak. Now the check engine light comes on. it puts out 3 codes ( PO102 ) ( PO300 ) and ( PO507). What did i do wrong and where should i start? van runs strong with no miss but idles high.

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You may have broke a gasket 0n the manifold and you now have a vacuum leak explaining the high idle. also check the iac sensor it may be stock partly open or sticking

Posted on Sep 26, 2009

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P0102 is MAF sensor problem, po300 is random misfire, p0507 is high idle speed. from all these at the same time , I am going to say you have a vacuum leak. recheck all your work, ck all hoses, ck anything you had apart, you may be able to hear it.

Posted on Sep 26, 2009

What are the three codes. Someone got them for you . Work on the code areas first and drivability later. You would know how the job went. It came apart okey and no problems going back together mehanically speaking. Clear the codes and see if they come back.

Posted on Sep 26, 2009

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Fig. Thermostat installation - 4.6L Engine

4.6L Engine

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I changed the intake manifold on my 1997 gmc safari van that has the 4.3L engine. Now the check engine light comes on. it puts out 3 codes ( po102 ) ( po300 ) and ( po507). What did i do wrong and where...


its soaking air somewere around the manifold make sure you thigten the bolts on the wight pattern if yoou dont know the pattern start from te center to the outside or reset the computer just unhooked the negative cable from the batery for 5 minutes,

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