I have a 1995 chevy tahoe. i have replaced theplugs air filter and reset the timing and it has a slight mis at idle and about 1250-2000 rpm inoverdrive it noticably misses. i blocked off the pcv valve that was malfunctioning and the idle got worse.the motor was rebuilt 30k miles ago and an rv cam was put in. what else could be the problem. also it seems like it has very little power for a 350. wont even spin the tires.
Check the cam lobes as it is suspected that one lobe has worn down and causing the miss and the lack of power
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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.
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Tahoe's are heavy and wear tires very fast 30k is pretty good actually for tahoe. but if u look at tire company sites they list wear factor ratings look for best number in your tires size and theoretically they will last longer.
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Sounds like the vehicle needs timed and or a tune up including plugs and wires be sure to gap them correctly or just by a set that is pre gaped.
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it could be the bearings in your transmissin. or you need an alignment
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Remove the air cleaner and look into the throttle body and see if there is gas coming out both injectors.If only one is working then switch the wire connector from one injector to the other.This will tell you if the injector is bad or if it is not getting a signal.Check for good vacuum at a good vacuum port.Should be close to 20 inches of vac.If not then this could be a good sign of bad timing or plugged converter.Hope this helps.Good luck.
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Did you replace the pcv valve or leave it blocked off?
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