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Comments
Now, it hesitates severely on acceleration. It does OK if you very slowly accelerate. Also, once it overcomes the hesitation it takes off and has no more problems until you slow down again. The hesitation occasionally produces what sounds like a quiet backfire. Hesitation is much worse when the car is warm. It doesn't really hesitate at all when it is cold. (Runs quite well until it warms up after a few minutes.)
I've had a couple of thoughts. EGR valve or throttle position sensor? Any other thoughts about what this could be and how to proceed. Also, the Chiltons has a flow diagram to test the EGR valve. When I apply a vacuum to the EGR solenoid it does not move the EGR (also does not hold a vacuum). Next step was to ground the diagnostic test terminal, but no indication as to which terminal this is on the EGR solenoid. Anyone know?
Thanks for your help.
Any other thoughts on things to check? Thanks.
That CD AUX switches between CD and then the radio FM-AM when a CD is in thats all. No MP3 connection so you need to buy the cheapo transmitter that goes on MP3 and tune FM to it.
My 2001 4x4 Blazer has been blowing cold air. I've replaced the already fine thermostat, and have checked the coolant and levels are fine. still making the kids wear ski pants and toques in the truck though. lol. Can someone tell me whether it would benificial to have the coolant flushed? I'm going home to check the heater dials, the heater doors and the hoses coming off the heater core (if I can find it). Any other suggestions would be so greatly appreciated.
Signed: Cold in Canada
Any ideas?
1. fuel pressure
2. cap/rotor/plugs/wires
3. other electrical such as coil
4. sensors
5. filters gas and air
I've been having a similar problem - no heat from only the defroster though. My blazer is a 2001 with about 82k on it and the coolant has never been flushed. The vents seem to put out heat (although its not super warm air, its definitely warmer than what comes out of the defroster). Do you think its the same problem or could it be something else? Also, if I do get the cooling system flushed, does that automatically flush the heater core as well(if that indeed is the problem) ?
Thanks.
PS
Would an ignition coil in the process of failing cause a hesitation on acceleration (especially around 20-30mph when accelerating at any speed more than a crawl)? Or... is it likely that I'll still be dealing with the hesitation issue in the future?
Thanks for all the help.
Thanks Repairdog!!
and i just put a fuel pump and a fuel line filter in it and when i start it up after i get about 2 miles down the road it stops and when i go to mash the gas pedal it wont do anything the engine wont even rev and then it will eventually cut off and about a hour later u can crank it back up and it will do the same thing does anyone now what it could be
THANKS AGAIN and HAPPY HOLIDAYS.
signed: Now warm in Canada.
For the 4wds have 2 sets of lines and a remote oil filter and the engine side lines require lifting the engine up one inch and are a pain to reach.
Any suggestions other than a sledge hammer?
They say they are unaware of any problems which i have mentioned.i wonder if its also going to snow in Florida.
how can i fwd GM's reply msg to you.
Tom
I have a '97 Jimmy. I had the tranny rebuilt 23k ago. I had no problems until driving on the highway a few days ago. Check engine light came on, went off, and I lost power. After that, could not go more than 50K, and the truck was over revvving up to 4500K. Got home, and tranny was really low on fluid, and smelled a little burnt.
Took the truck to dealer, says the computer code reads "misfiring cylinder". Dealer says that I "should replace transmission". Does this sound at all related to a misfiring cylinder? Seems odd that there were no "faults" in the tranny, but Dealer thinks it should be replaced, and what about the misfire? I'm confused and I feel like I'm being hosed. Another mechanic friend says this could be a torque converted lock up, and to replace tranny filter, flush tranny, do oil change, and drive it.
Any opinions or advice would be greatly appreciated.
Dave :confuse:
Any good trans shop can hook up their analyzer up and oinpoint the trans problem.
Is this action standard operating procedure for the 2001 Blazer? Is this a problem that should be fixed?
Thanks
I did replace cap & rotor and got rid of the 0300 fault. Am having the catalitic converter taken care of tomorrow. I'll make sure to post what I come up with.
Thanks again!
Transmission shop checked it out and said it had an engine miss, and maybe it was
the cap and rotor, I changed that, but no help, I am now going to replace the coil and ignition module mounted on intake, fortunately I have an extra one, so I will see if that cures it.
anybody got an idea, you think Im going in the right direction?
It seems strange that you can only feel the miss when it is in lockup between 42-54 MPH, I respect the Tran shops diagnosis, I dont think he is giving me runaround, if the coil dont fix it , then I will change the plugs, it has 52000 mi. on it.
Thanks in advance for any help. Henry