Questionhello sir, i have a '92 RR with a 3.9l v8, and my problem is this, the gas pedal must be used to start the truck, then if it indeed idles (sometimes stalls, sometimes surges) stepping on the gas in anything but a gentle manner will cause the engine to bog down and stall. any ideas would be helpful. thank you for your time. sincerely. daniel
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Hi Daniel,
have you determined what was causing the problem? Does your Rangie have a coilpack or the traditional coil. I've been told that sometimes the coil can be the cause of difficult starts. It can fail due to overheat.
Let me know what you find out....
Regards,
JohnMc
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Hello Daniel,
(just call me John)
There may be several reasons why you have difficulty starting and running your Rangie engine:
It may be that you are not getting enough spark to start your Rangie. Once started, maybe your Rangie is flooding - again, not enough spark.
Usually, ignition problems are associated with the plugs, wires, coil, distributor, alternator, starter and battery (in a backward kind of order). In between this is the ECU and O2 sensors that generally govern the fuel and spark. It could be an ECU related problem but I hope not. They are expensive to replace.
Have your Rangie tuned up. New plugs, wires, rotor cap (found in distributor). Have the timing checked with a strobe light to make sure its firing correctly.
Sometimes when the coil fails you can have a weak spark. If the distributor cap has a crack it can also reduce the spark. One night, open your hood (bonnet) and using a fine misting bottle with water (used for indoor plants), spray a light mist over the engine as it is running. That is IF you can get the engine to run. When you do, spray a fine mist over the area near the spark plug wires and coil. If you see sparks or hear the engine bog down you should then replace the entire set of wires.
Another problem could be vacuum related. Almost all local garage mechanics could test your vacuum system at a reasonable rate.
If you establish that you have a good spark, it could be that little or no fuel is being fed to your engine. Perhaps you have clogged fuel filter or your fuel pump is failing. Remove a spark plug and see if its 'wet' which would indicate no spark. If it is light grey it could be that you have little or no fuel. A nice brown/black is what you want to have.
Best of luck,
JohnMc
NB: check the air filter too.
