|
1997 Ford Explorer Chugging - Engine
Question: While I am accelerating and driving my RPMs drop down to below 1000. It feels like it's going to stall, but never does. The check engine light never comes on. I had my mechanic run a computer diagnosis and there weren't any codes.
I regularly have my fuel filter and transmission fluid changed. It was almost time, so I went ahead and had that done. While there I also had them clean the fuel injectors. No help. Any suggestions?
Here's How To Get Guaranteed Solutions In Minutes
|
|
Technican: Clean the MAF (mass air flow) sensors filament.
If this shows no signs of improvement check the fuel pressure.
Next check the exhaust backpressure. This can be done with a vacuum gauge. Hook the vacuum gauge to the intake manifold with a cold engine. Start engine (observe gauge) and raise the rpm's to the equivalent of fast idle. If the gauge begins to fall significantly after a few minutes exhaust backpressure is to high. Most common cause is a plugged catalytic converter.
Owner: I replaced the MAF and had a mechanic check the pressures. They are fine. I'm still having the problem.
Technican: If your mechanic ran computer diagnostics and nothing was out of range, the PCM (powertrain control module or computer) likely needs a flash upgrade. This is a common occurence with Ford products. The PCM flash is usually performed at a Ford garage, although you may find an independent shop with the equipment to perform the service.
Owner: I replaced the ECM with a new one and that didn't help.
Technican: Where did you purchase the ECM?
Owner: From www.ecutecparts.com
Technican: Check to make sure the accelerator (including throttle blade is not sticking).
Also does this happen at all engine temperatures?
Was the ECM new or used?
I need this information before I contact Ford Tech Service.
Owner: It does it at all temperatures and speeds. The ECU was used.
Owner: I had it towed to the dealership. The computer still doesn't return any codes. They think it's an electrical problem that's cutting out the ignition. They don't know where the problem is, so they're going to start taking it apart and troublshooting wire by wire. Any ideas on what the most likely problem could be?
Technican: They shouldn't just be checking for codes. They need to record live sensor data and see what value is corrupt when the problem occurs. Here's How To Get Guaranteed Solutions In Minutes
|
|
|
