Question about 1994 Buick Regal Gran Sport

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Recently had a tune up done including new spark plug wires and a new EGR valve and the car will not accelerate over 35 mph what can be causing this.

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Have an exhaust shop check the converter, sounds like its stopped up

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2 Answers

My 2007 chevy malibu is idling rough and will not accelerate over 25 mph what could be wrong?

Most likely is :
It needs a "Tune-up".
That is, unless you had one in the last 5 years.
A tune up should include new spark plug wires (for sure) and perhaps a part in the distributor or two, and maybe some new spark plugs.
Other causes might be a plugged up fuel filter or a bad "computer temperature sensor".
God bless your efforts.

May 22, 2018 | Chevrolet Malibu Cars & Trucks

1 Answer

My 86 camry runs fine until I hit 40 miles an hour then it feels like it is skipping or missing..gets a little worse as I accelerate..any ideas?

Sounds like you're likely getting a misfire, possibly due to old spark plug wires or a fuel delivery issue. I recommend that you do a major tune-up on the vehicle, to include new spark plugs, spark plug wires, distributor, rotor, and ignition coil, and fuel filter. Once you have completed the major tune-up, (if carbureted) rebuild the carburetor and verify proper operation of the fuel pump (or if fuel injected) verify sufficient fuel pressure at the fuel rail and replace the fuel pressure regulator and/or the fuel pump if necessary.
Also, if your vehicle is equipped with an EGR, verify that the EGR is operating properly (as the EGR opens at 40 m.p.h. when the engine is warm, and if it is malfunctioning may be causing an issue).

May 21, 2015 | 1986 Toyota Camry

1 Answer

1996 mazda mx6-hesitation problem when accelerating-i have replaced spark plugs and gapped at.044-new plug wires-fuel filter checked timing-new egr valve also-egr valve helped problem on a scale of 1-10...

The rubber hose from air filter box to throttle body commonly splits along one of it's grooves and will open up on acceleration and cause a hesitation

Sep 06, 2011 | Mazda MAZDA6 Cars & Trucks

1 Answer

My '01 impala 3.4 v-6 flat spots when COLD, at around 20mph. the idle is ruff with random misfires. acceleration is overall poor. when HOT, most symptoms go away leaving only some slight acceleration...

depending on mileage, but possible tune-up could fix it. if already done then check ignition coil pack and ignition wires also spark plugs, check vacuum hoses for leaks or porous, last injectors clogged - use some techron fuel injector cleaner (wal-mart has them). Also get the throttle body and iac valve cleaned by throttle cleaner . Also this other possibilities are to be checked and confirmed.:---- Engine running rough or misfiring can be cause by the following:

1.Defective spark plugs
2.Inadequate spark/coil, defective spark plug wire.
3. Lack of compression
4.False air leakage.
5. Faulty fuel injectors.
6. Insufficient fuel pressure.
7. Contaminated fuel.
8. EGR valve that is leaking.
9. Oxygen sensors.
10. Throttle position sensor.
11. Manifold absolute pressure sensor
12.Mass Airflow Sensor
13.Idle air control valve

--------- This should help.Keep updated.Thanks.Helpmech.

Mar 27, 2011 | 2001 Chevrolet Impala

1 Answer

What is an ignation tune up for a 99 Merc. Gnd.

A full ignition tune up would be new spark plugs and wires.A cap and rotor if it has those. Do any fuel system cleaning before changing the plugs.

Jun 22, 2009 | 2001 Mercury Grand Marquis

2 Answers

Under heavy acceleration the car stumbles, runs rough

I am having the same problem with my mustang, have replaced tps, egr valve and sensor, clean maf, new plugs and wires, new fuel filter, cleaned throtle body and still having same problems....Please help!!!!!

May 29, 2009 | 2002 Ford Mustang

2 Answers

1996 Mitsubishi Montero has no power..

My 96 Pajero SWB 3.0 would loose power as soon as i accelerate. It feels like the spark plugs are miss firing or if the engine was flooded.

I did a general service which included oil change, oil filter, fuel filter, air filter, spark plugs i checked my O2 sensor, dissembled and cleaned throttle body and sensors. Cleaned air intake sensor as well as the distributer etc.

Problem not solved, still loose power when i accelerate....can it be something wrong with my ECU??

My A/C control isnt working at all. Found a 15Amp fuse that was blown but when replaced it shorts again. Where can i get a wiring diagram of the heater/a/c system for my vehicle model?

May 28, 2009 | 1996 Mitsubishi Montero Sport

1 Answer

Dodge ram 1500 studdars a little bit between 35 and 45 mph

A misfire on # 8 Cylinder which can be caused by poor fuel quality or metering, low compression, lack of spark or unmetered air entering the engine. 
There are other possible, less obvious causes as well. 
Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiriing

I would get the Dyno tuned and see what the computer is reading 35 and 45 MPH. or you could check with your local dodge dealer to see if there was a recall or update on the Computer if there was or is any issues. 
Good luck and hope this helps, Old School was so much easier.

Apr 09, 2009 | 2005 Dodge Ram 1500

1 Answer

Car is not wanting to accelerate

Did you check the catylactic convert may be plugged

Dec 03, 2008 | 2001 Chevrolet Corvette

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