Question about 1999 Chevrolet Tahoe
After the Truck is fully warmed up (about 20 min) driving home under load up a hill sputters and drastically drops rpm about 500 to 1000 rpm, changed fuel filter and pump has gotten a little better but still proceeds to chug up the hill. this is at 80km/hreven first gear uphill load seems to do the same thing and when i got into my drive way it sputtered a little in park so i know its not transmission related. any ideas?
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Posted on Jan 02, 2017
The fault could be in the ingnition module in the dist.I had a car one time that did the same thing but when it was cold,try replacing the the ignition module.
Posted on Jan 02, 2009
You could have a dirty EGR valve, you can re move it from the manifold and clean it with Throttle body cleaner. Might as well buy two cans, since your cleaning the EGR, might as well clean out the throttle body too.
Spray the throttle body cleaner in to the throttle body with the engine running and try to keep it at 1000 rpm and then to 1500 rpm as you clean out the throttle body and let it idle down for 2 min then turn the engine off. Then turn the engine to the run position for 10 seconds and start and let idle, ro for a test drive and hope that solved the problem, if not there a few more things we can do which will consist for tune up.
Note: Clean the EGR first so you don't burn your self since the engine would still be cool before you clean the Throttle body.
Good luck and keep me posted.
Posted on Jun 01, 2009
I have a 99 blazer and ever since I have owned it, it reads lower in pressure when idling, but will go up too 40 while driving. This is normal for the vehicle. If the pressure gets real low, and stays low, it means its time for an oil change.
As long as the pressure goes up when you give it gas, it is fine.
Posted on Jan 09, 2010
Testimonial: "But why has it started reading low, especialy after the new oil pump was put on. It read a constant 40 even when idling before."
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