Stalling issue - random
Hey guys,
I have a 1993 Range Rover LWB with 142K on it.
I wouldn't say that this is a new problem, but it is definitely a random problem that has been plaguing my rover for the past year. I guess to start off, I'll begin with a quick background story of the idle problem...
Th rover stalls out very randomly at red lights. I would say this has been happening 5% of the time. Over the past year, it went away for about 5 months. I had an issue with a dirty MAF sensor a while back, and well, long story short, it was K&N filter oil getting on the MAF sensor. There is no black smoke, and the RPMS bounce from 0 to 750 for a few seconds, and then the engine dies. Not the same symptoms as with the MAF sensor. Before I go out and start spending money, I would some help trying to pinpoint the cause of this frustration:
1) Stepper motor has been replaced/cleaned recently
2) O2 Sensor have been replaced recently
3) "New" spark plugs have less than 30k on them
4) Again, this problem is random. After I restart the engine and idle it, it will idle normally, and would probably do so until the gas ran out. I can idle it again for 10 to 15 minutes no problem.
5) On-board diagnostic not throwing any codes
6) I rebuilt the fuel pump yesterday with an Airtex 3240
7) I have run Seafoam through gas tank and intake recently
8) The problem tends to happen after driving on the highway, and usually starts to stutter and stall at a light after highway driving.
9) Fuel filter was replaced about 20K ago and will be replaced tomorrow.
When I first got the car, this problem kept reoccuring for a few months. Finally, for 5 months straight, it did not stall once. After fiddling around with the air filter/MAF sensor/cleaning the throttle did it start acting up again.
This is a very frustrating problem! Any input would be appreciated
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