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Rough idle and will bog out when you let off the gas
1991 Chevrolet Corsica

Rough idle and will bog out when you let off the gas

(1991 Chevrolet Corsica)
It first started with rough idling, then after a few weeks it got to the point to where you would have to start it in neutral and as soon as it starts you would have to take off instantly or it would stall and when driving it, it would act like it wasn't getting gas, when ever you go to hit the brake it would start bogging out until you punch the gas then it would lag then take off. It finally died on me on the high way I let off the gas and it started to putter but when I pushed the gas it bogged out slowly and hasnt been abl to be started since. I've put new plugs, wires, thermostat, water pump and radiator and still won't start. I keep thinking fuel pump. Any advice???
1 answer & 0 comments
Popular Answer
on May 25, 2017
Hello,
I do not suspect the fuel pump, I suspect either a bad intake manifold gasket, a leaking brake booster, head gasket, failing charging system components or ignition coil/distributor cap and rotor.
Check the dipstick for creamy colored oil first, then check the coolant for oil contamination.
Afterwards, you can have the coil tested, as well as the complete starting and charging system.
If your guy insists on the fuel pump, test for fuel pressure at the engine, and make sure your pressure does not bleed off quickly.
In this particular situation, I would recommend having a professional diagnose the vehicle, as the cost of diagnostics is probably less than you have already spent on parts that did not correct the issue.
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General Diagnosis
$88 - $111 Learn More
on May 25, 2017
Hello,
I do not suspect the fuel pump, I suspect either a bad intake manifold gasket, a leaking brake booster, head gasket, failing charging system components or ignition coil/distributor cap and rotor.
Check the dipstick for creamy colored oil first, then check the coolant for oil contamination.
Afterwards, you can have the coil tested, as well as the complete starting and charging system.
If your guy insists on the fuel pump, test for fuel pressure at the engine, and make sure your pressure does not bleed off quickly.
In this particular situation, I would recommend having a professional diagnose the vehicle, as the cost of diagnostics is probably less than you have already spent on parts that did not correct the issue.
Sign in to reply

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