Question about 1987 Chevrolet G30
Surging replaced map sensor ,wires plugs,cap rotor,idle control,egr, still surging ,pulled oxegen sensor out runs better but not right
Posted by Anonymous on
You might want to do a tail pipe pressure test to be sure your exhaust system is not partly plugged. I am assuming that you pulled the 02 sensor from the exhaust pipes or headers. The headers sound as if they have been on the truck for awhile and are not new to the unit so then I would not think they are causing the problem. But I tell you for sure the plugged exhaust system will.
Posted on Apr 10, 2017
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Posted on Jan 02, 2017
Spray the intake with carb cleaner to find the vacuum leak. Check where the EGR mounts and the throttle body gasket sense you had both off.
Posted on May 10, 2009
This problem can be caused by defective spark plug wires that are cross firing due to voltage leaking to a nearby plug wire as well as a flat camshaft lobe.
Posted on Jan 16, 2011
when the engine starts the O2 sensor volts should be around .5 volts or 500mv so the 450mv is correct now i don't know wither your next statement is 115mv of 1150 mv it makes a big difference, so get back with me and i will see what i can do for you.
Posted on Apr 24, 2011
SOURCE: i have a 1995 chevy
hesitation with TBI is sometimes a dirty Injector, make sure you have a good fan pattern on the injector and make sure its responcive. use a nylon wire brush to clean the tip, and alot of carb cleaner, also make sure that your butterfly moves freely, they tend to get gue/carbon build up on them and this will also cause a hesitation
Posted on Sep 22, 2011
SOURCE: i have a 94 k1500 with a tbi 350 it idles fine but as soon as you put it in gear it dies i changed throttle position sensor and plugs wires rotor and cap still not better you let the truck sit a week
check the idlle control valve
Posted on Jul 13, 2012
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