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On no account touch the sensor wires with anything physical as they are extremely fragile
if its OK then its possible the clutch is slipping ? If there's a 'hot' smell from under the van and if it struggles to accelerate up hills then this would bear it out
if its an automatic transmission then check the fluid levels in the transmission
I forgot to mention that I did clean the MAF sensor a couple different times now. I used CRC MAF Sensor Cleaner.
The problem is not transmission related.
I'll try to better explain whats happening. When accelerating at slow and steady pace the van will seem to be fine then all of the sudden it will jump to life as if the throttle was suddenly pressed 3/4 or more to the floor. It's as if its bogged down, starved for fuel??? plugged up??? on a slow acceleration and then all of the sudden its running well. It's hard to explain.... It just all of the sudden will spark to life like the throttle was stomped on.
I have been working on vehicles for nearly 20 years and this one has me scratching my head.
Any other help would me much appreciated.
I tried that a couple of times as well.
Is it possible that a bad catalytic converter could be causing the trouble? I dont understand how it would but my cats aren't in the best condition
Ok I was thinking the same that it would be a consistent power loss.
Any other suggestions?
I can recheck the fuel pressure. I checked it a couple months ago and it stayed constant. There is also a new fuel pump on the van. The old one was sticking when first started and about to fail. unfortunately the problems i'm having now didn't change at all with the replacement of the pump. I'm doubtful that the pump but I haven't checked pressures with the new pump.
I can change the filter again too.
Sorry for my slow reply. Had a family situation the last few days.
I will check the wiring ASAP. It's possible that it could be an electrical problem. I discovered yesterday that I have a bad diode in my alternator. I know that faulty alt's can cause strange engine/trans problems. I will be replacing the alt today.
I also checked my codes and came up with 2. P0325 Knock sensor and P0401 which is EGR related.
I know the 4.2 engines are notorious for plugged EGR passages as well as the ports under the intake. I don't know that this is the cause of my problem since it is inconstant. I assume that blocked ports etc would cause a more consistent problem. What do you think?
As far as the knock sensor code. I'm wondering if the sensor is faulty and retarding the engine which would cause the problems I am having. What are your thoughts on this? Do you have the test procedure for this sensor?
Thank you much
Do you have the test procedures for the knock sensor? There must be some way to test it with a meter
Hello Timthey can be tested like this
trouble is this test won't show up a sensor thats 'noisy' and so sending false signals
That makes sense. Thank you for the info. I will report back ASAP.