Question about 2001 Chevrolet Malibu
There is no CEL and no error codes. If I apply more gas or drive with overdrive on, car does not ****. It jerks at below 2000rpm
Have your cat convertor checked at exhaust shop for free,looks like it is partially clogged,or it can be your TPS(throttle position sensor)
Posted on Jun 19, 2014
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Posted on Jan 02, 2017
With modern cars it is bad when the engine light just comes on and the vehicle does something very different. It should not be driven. If the car is smelling of fuel and jerking it is because it's miss-firing (i.e. one or more cylinder is not getting spark but is getting fuel). This can be anything from electrical/electronic to mechanical like a broken rotor cap (as an example). The good thing, is that the light is coming on and a mechanic can check the ECU for error codes. Alternatively, you can buy or barrow one your self and check it out on your own (I think even certain auto-part stores will check it for you as long as you get in the zone;). 1996 is a good year for that since that is when OBDII started and all vehicles started using the same port to check for issues.
Posted on Feb 17, 2009
1. Extremely harsh shifts from P or N, normal shifts at WOT: EPC (Electronic Pressure Control) solenoid failed. Easy fix in pan. Fix as soon as possible or hard parts will eventually break.
2. Shift suddenly become very hard. When going from park to either reverse or drive it slams into gear. 1-2 and 2-3 shifts are also harsh. All gears seems to work. Problem may be intermittent: Check TPS for smooth electrical response. If the response is jumpy or erratic at all, replace TPS.
There are two thing that may be happening that you have described, but you can tell which one it will be since your driving the Blazer. Both are simple to repaire, but to change the EPC. Your going to have to drop the transmission pan so that's going to be a transmission shop and call around, the EPC can be replace the same time there draining the transmission fluid when servicing the transmission which is about $110.00 for fluid and filter replacement and additional $65.00-$80.00 for the EPC valve.
EPC (electronic pressure control) valve TPS (Throttle position sensor)
Thank you for using Fixya and good luck. If it's the EPC failure, replace as soon as possible. may casue the sunshell to fractured or splines to sheared off.
Posted on Apr 04, 2010
Sorry Cleef, on dial up and lost the connection.
The reason it does this at higher speeds is that more ignition spark is needed to fire the spark plugs.
Yes, it's time for a tune up.
A shop that has a scanner can identify which cylinder is causing the misfire. It will have stored a code to do this.
I hope you find a good expert on chat. If not, message me back here and I will help you find your problem.
Again, my apologies for my poor connection.
Posted on Jan 16, 2011
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The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM
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