Will start but won't run in idle once u take ur foot off the gas it dies
1990 Buick LeSabre

Will start but won't run in idle once u take ur foot off the gas it dies

(1990 Buick LeSabre)
It started yesterday I was sitting in idle and it died since then havnt got it to run more than 5 mins and can't even do that without constantly giving it gas I've check fuel filter fuel pump and relays I've heard mybe check the crankshaft sensor need to check fuel regulator anymore ideas of what to check it also has new maf sensor
2 answers & 1 comment
Popular Answer
on April 13, 2015
pull the vaccum hose off the fuel pressure regulator.check hose for cracks,splits,dry rot.also if any signs of fuel in the vaccum hose,replace the regulator,its bad.
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General Diagnosis
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on April 13, 2015
pull the vaccum hose off the fuel pressure regulator.check hose for cracks,splits,dry rot.also if any signs of fuel in the vaccum hose,replace the regulator,its bad.
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on April 14, 2015
Could be vacuum leak or just needs an idle adjustment.
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on April 14, 2015
no adjustment on the idle air control valve.pcm makes the adjusments as needed.but, the iac valve pintle and spring may be clogged with carbon,(seen this on several)you can remove the valve and clean if needed,but dont screw the pintle in or out while cleaning.

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