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SUVs Chevrolet TrailBlazer Chevy Trailblazer - Loss of power
32 messages, Last post on Dec 23, 2008 at 8:30 AM
You are in the Chevrolet TrailBlazer Forum. Your Hosts are steve_ & tidester
howdy all. got my 04 TB, 4.2L v6 in 06 with 13k miles, 23k miles now. was a salavage title (insurance mistake) so no warranty  everything worked fine. So few mo later had to replace the battery since it's been sitting for a 3-4month and the stock one slowly went dead on me. I'm a computer admin with some mechanics experience from working on Ninja 900cc..can do maintenance but not much of a troubleshooter when it comes to cars I started noticing that once in a while i'd be driving in the range of 20-65m/h and have no power regardless how I push the gas pedal. Engine runs but tranny doesn't get invloved. I'd release the pedal and just roll for a couple of sec and push again and it'd be fine. well, it's been over a yr now, and i find it doing it almost every time I drive it. it happens when engine is cold and when it's at normal op temp (I'm in Dallas, car warms up very fast). Most of the time it happens on the ramp getting on the highway and speeding up on the hightway but mostly in that range. I haven't had any warning lights come on or engine lights... starts everytime, even in the winter. I change oil myself every 3,500 (Castrol GTX 5w30 with AcDelco filter). Tranny oil is still from the factory. so one day it wouldn't pull while going up a steep ramp and tried releasing and pushing the gas pedal as always but the engine just died. I was able to pull over to the shoulder... switched to neutral and SOB started just fine! I tried scanning the computer, but the scanner can't seem to establish a connection (keeps telling me to plugin the cable). I'll take the dash apart this week to check if I forgot to connect the OBDII jack back after I run the fog light switch from the dash into fusebox. Some guys were mentioning bad Neutral gear switch .. can I test that in some way or only a dealer can do that (where is it anyways)? Is it possible that I cause the problem by resting my right hand on the gear selector while driving? Since the car didn't have warranty I made following upgrades after I got it: replaced the stock stereo with a mp3/USB deck (had to buy special harness with a chip) and installed a pair of fog lights with harness (7A on the same fuse as RPM gage, only I replaced 5A rpm fuse for a splitter with 2 5A fuses) Thanx so much in advance for any ideas and advice. |
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Replying to: satvic (Sep 17, 2007 9:31 pm)
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Replying to: vbell (Oct 29, 2007 9:50 am)  Well, I haven't gotten around to checking my OBDII connections so I can't scan for anything I now mostly drive on cruise control cause it only happens when I'm pushing the pedal by foot (even though I check everything I can't see what's causing it) .... in mine, the injection controlled by a switch (when I push the accelerator down) the cable that goes to the throttle opener goes through a switch .. thinking to replace that and to see what happens. Now I started getting engine light during rainy weather .. i think one of the oxygen sensors .. but no idea which one. after i drive for an hour smth must be drying up cause the light goes away
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Replying to: vbell (Oct 29, 2007 9:50 am)
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Replying to: ficuss (Nov 14, 2007 7:18 am)
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Replying to: satvic (Nov 22, 2007 2:56 pm)
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I understood So, in this case my question is: is there smth in the system that can fail and cause the loss of power EVEN IN CASE where the Onstar was never installed on this particular car to begin with? Shouldn't there be some kind of plug to complete the circuit bypassing OnStar device features? any idea what it'd look like if it exists?
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Replying to: satvic (Nov 25, 2007 9:26 pm) One more thing, do a search of "reduced engine power" in the Ranier, Trailblazer, Envoy forum and see if anything sounds similar. |
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Replying to: satvic (Sep 17, 2007 9:31 pm) I've had no major problems since, other than the fact the SES light stays on all the time. Even after being reset. I seriously put black tape over it. I have 120K miles on it now.
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Replying to: bigbassguy1 (Nov 27, 2007 10:29 am) |
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