QuestionQUESTION: How do you remove and install a new crank sensor on a 91 Chrysler imperial 3.8 V-6?
ANSWER: Hi David,
Please don't use the Private question option in the future unless there is a goog reason as no one else can learn from our exchange.
You simply disconnect the plug-in lead (gently lift retention tab), and unscrew the bolt, and pull it straight out of the hole. Make sure the paper spacer is applied to the face of the new sensor. Insert it in the hole until it comes in contact with the face of the drive plate. Then holding it in that position tighten the retaining bolt to 105 inch-pounds which is about 9 foot-pounds. Put the lead on the plug-in socket and you have done it. It is located at the rear of the engine, at the seam between it and the transmission.
Roland
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QUESTION: My 1991 Chrysler Imperial seems to be hesitating and wanting to stall out after you first start it and put in into drive. I put in new plugs and wires. Also, the exhaust smells like rotten eggs. Seems the exhaust is very rich. I was thinking of replacing oxygen sensor or coil pack. I have 90,000 miles on engine. Any suggestions would be greatly appreciated.
ANSWER: Hi David,
Have you checked for fault codes? Using the ignition key:"on-off-on-off-on and leave on" doing that in 5 seconds or less elapsed time. Then count the number of flashes between each pause of the check engine light which remains "on" but then begins to flash. Repeat for accuracy then let me know the flasher number count in order of appearance.
You might also want to check out the egr valve to make sure that is is closed tightly when the engine is off and after you are trying to get it to idle. There is a pipe between the right exhaust manifold and the intake near the throttle body and in the pipe is mounted the body of the egr. It has a round vacuum actuator on top and a flange in between those two parts. Inside the flange area you will see the valve stem with a slot into which you can put the tip of a screwdriver so you can move the stem back and forth. Make sure that the internal spring-action causes the valve to close to a dead stop. If the valve is hanging up slightly ajar then spray some WD-40 on it where it enter the valve body and work it some more.
Let me know the flash count and we'll go from there as to what to replace. It sounds like a mixture issue, not a spark issue, so the O2 sensor is one possibility, but lets see the code readout first.
Roland
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QUESTION: Roland,
There was 11 flashes(counted twice)
On Friday, I plan on checking the egr valve to see if stem is stuck.
Any other ideas would be helpful!
Thanks
David
AnswerHi David,
That 11 code is for the crank sensor which I understand you already replaced so the code is "stale". You can get rid of the stale code by disconnecting the battery for a few minutes, but that will cause a 12 code (battery disconnected recently) that will last until 50-100 ignition key cycles and then self-erase.
So with no other codes to work with checking the egr seems to be the next step. Because there are no indications of an oxygen sensor code or a coil pack code I would not throw money at those items with any hope of success. You may have to wait for a new code to be recognized, something subtle like a sensor that is going bad but hasn't been detected as such, yet. I had that experience myself with a MAP sensor whose condition was only detected with a diagnostic readout of its parameters (it thought we were at high altitudes rather than near sea level, but didn't set a fault code). I will be on vacation for 5 days starting tomorrow afternoon so can't give you much help till Monday.
Roland
