4-Banger Possessed...

I bought this car from a little old lady who drove it to church and back. It has some issues that I'm still stumped on.

When I bought the car, the only real problem was that it turned to the left a little. Simple fix. Tires, rotate and balance, alignment. As the years went buy, things needed replacing. Fuel pump, starter, alternator, valve cover gasket, cv axles & axle seals, spark plugs, wires, distributor, fuel filter, brakes, and battery terminals. It's a 25-year old car, so most of the rubber was dry-rotting. Recently, I've been having some issue with the car idling up and down, a loss of power, and what feels like the engine is working against me. I tried everything from compression test (good on all cylinders), to adjusting the distributor positioning using a timing light and tach, to replacing the plugs again, checking the spark plug wiring order, and throttle position. It has a brand new air filter and fuel filter and fuel pump that all meet oem requirements and are functioning fine. Spark is good. I keep ending up at timing. The vehicle has a timing chain. New issues that have come up have included: Valve cover pinging/ticking, increased loss of power, continuous change in idle RPM, and lastly and most horribly...it dieseled...I turned the car off one day, and it ran uncontrollably. I had to literally cut the fuel line because the RPM was steadily rising and dropping like someone was doing arpeggios on a de-tuned cello. Perhaps you can help me. Perhaps you can't. When describing my problems with this car, every mechanic has told me to give up and scrap it. I know better than that. They just don't want the work that goes into it.

Comments (2)
No. 1-2
NikolaiKitov
NikolaiKitov

1993 Nissan Sentra XE 1.6L. I typed it the first time but the site had an issue and had to retype all this. Forgot to include it the second time. 77,000 miles today.

ScottyKilmer
ScottyKilmer

Editor

should have told me make, model, and mileage so I could gauge it better. but if it's a nissan, the timing chain tensioners and chains often wear inside and do just htat