Hi Wendy,
I'd like to know more 'symptoms' But here's my best guess;....service engine light ON....blinks when car runs the worst..... when you get it up to speed, it runs fine......idle too long,doesn't wanna go!!? Sound familiar? check EGR valve, vacuum solenoid,hoses,sensor -exhaust pipe to EGR valve &/ or the tubes to the sensor could be clogged....Not Your Scenario? Send more info; What engine;fuel injected? Other work done;Fault 'codes' if you can.
You need to take special equipment to read the trouble code's and to diagnose the problem. There is also a danger factor working on them and not knowing what your doing. Your best bet would to be take it some where and have it looked at. http://www.careucar.com/
Check your ht leads ,coil packs are all functional .then check your spark plugs are not fowled.if this is not the cause it will be your egr valve is not opening correctly.buy a diagnostic scan tool of ebay for around $40 it will pay for its self with time . Great piece of kit you can carry in your dash,,,
SOURCE: 1998 Cavalier 2.4 L stumbles and misses at 2000-2500 RPM
Vacuume Leaks can cause this problems. you have to do a through check of vacuum hoses and the EGR valve. Your best bet can be to have your vehicle scanned at an autozone store and get a code. The EGR has to be closed at idle, then as the engine warms up or is accelerated, the EGR opens. That is if your car does not have an electronic EGR . The electronic EGRs do not use vacuum to operate. They are controlled by the PCM (power train control Module).
SOURCE: 98 Cavalier 2.4L engine stumbles at 2000-2500 rpm
Could be a short in the wiring for the O2 sensor. I currently have the same issue only my car finally threw a code after two days of it acting up. Code 106. Changed the MAP sensor and it now throws 108, MAP sensor high voltage circuit. Ah the joys of cold weather and broke down vehicles. But I know that you wont always get a code with a short. Let me know if you fixed the problem.
SOURCE: 2002 kia spectra has hard time picking up speed
I had the same problem. I changed my fuel filter too.Your catalytic converter is clogged. I could put the pedal to the floor board and couldnt hardly pick up any speed. I could hardly make up a hill on the highway. Take it to a kia dealership and they will, they should replace it for free, they did mine and I didnt have a warranty. I think there is a warranty on that specific part. That's what it is though.
SOURCE: 2004 toyota rav4 does not accelerate
check fuel injector rail pressure sensor take plug off one side iff engine does not cut out change sensor
SOURCE: 2000 Hyundai accent acts as if it is starving for
We've have the same problem with ours. We found the fuel canister needed replaces. It's mounted near the back bumper with straps. The part cost us about 125 bucks and was pretty easy to replace. The trick is to get the bolts out without snapping them.
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