HELP! Sputter, cough, no acceleration. IMRC? Coil? Injector?
I'm new here and having serious drivability problems with my 2002 2.3L 2WD Ranger. Symptoms: If I do any more than breath on the throttle when accelerating from a dead stop, the engine sputters and coughs and is quite reluctant to accelerate until the revs reach ~3000 rpm. This also happens if I manage to get up to a decent speed and attempt to accelerate.
A recent trip to my local AutoZone for a diagnostic check produces the following:
Intake manifold runner control fault-bank 1
ECM detected the signal from the IMRC was less than expected-Valve stuck open.
1. Mechanical condition-
2. Open or shorted circuit condition
Cylinder misfire detected-cylinder number 1
The powertrain control module monitors the crankshaft speed and has detected a misfire condition.
1. Ignition system fault-sparkplug(s), ignition wires, coil
2. Vacuum leak
3. Injector fault
4. High or low fuel pressure
When these symptoms first appeared, I replaced all plugs and wires. This did not improve the situation. I replaced both the vacuum lines on the IMRC (the lower one was indeed cracked open). This did not improve the situation. I replaced the fuel filter. This did not improve the situation. I am reliably informed that the fuel pump has been replaced approximately 4-5 years ago.
Might these problems all be related? If I replaced the IMRC, might the misfire problem be resolved as well? Other way around? Coil? Injector? Fuel delivery? Chasing an electrical or vacuum problem?
Any assistance would be most appreciated. Many thanks!
2002 Ranger 2.3, 2WD
Daily driver and weekend warrior for home improvement projects and hauling band gear around.