Engine Performance problem
1993 Plymouth Acclaim 4 cyl Front Wheel Drive Automatic 137000 miles
Hi Guys, Love your site.
This car runs fine at idle and when revved up but when I get on the road it will run fine at first then go through periods where it hesitates, spits and sputters for a couple of seconds, then runs fine for a little while, then does it again. What are your thoughts? Thanks.
Hi Brownie56, Welcome to 2carpros and TY for the donation
Its a long list but has to be checked to get to the source of the problem
Inspect and test all the following listed below, we start here and comeback with results
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
Fuel pressure regulator leaking, fuel filter or defective fuel pump.
False air leakage.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.
Note: If it doesn't apply disregard and continue testing
September, 1, 2010 AT 6:28 PM
Upon further inspection I found that the engine appears to only be running on three cylinders. It's getting spark but not sure about fuel. The air filter is toast. I'm thinking: cam, EGR valve, fuel injecter. Any ideas?
September, 19, 2010 AT 1:05 PM
Is the Check Engine Lamp indicating?
September, 20, 2010 AT 10:06 AM
The problem ended up being a simple tune up was needed. Cap, rotor, plugs, and, wires. I pulled the plug on the non firing cylinder to see if the plug was firing. It fired a few times and quit. I pulled the cap and saw that all the contacts were in bad shap.