code 18 help

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May 3, 2004 | 10:13 AM

skidd

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code 18 help

I have a code 18 on my 87 ranger[ 2.9 auto 4x4] it is in the continuous memory and it keeps coming back where do I start my book says it has to do with no tach signal to ecm or eratic idm,ecm or spout circuit failure.

May 3, 2004 | 11:14 AM

Ken00

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From: South Jersey

The most likely cause is a wiring problem in the ignition, spout, PIP, IDM or ground curcuits. You will need to run the pinpoint test to determine the exact cause but you should check the TFI, coil, pulgs, wires, cap/rotor and PIP too. I can email you the pinpoint test if you need it.

May 3, 2004 | 04:26 PM

skidd

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that email would be great. I all ready replaced plugs wires cap and rotor.I tested the wire from the spout to the dist.and it has continuity bet when running at idle I only get 5 or 6 volts at the spout termanals it should be 12 -13 shouldn`t it this is the only test I could find regarding the spout thankfull for any help

May 3, 2004 | 05:02 PM

rangerkiller

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Don't know much about your year but the pickup coil is a likely candidate. If it runs but still runs rough, it would be my best guess for stricly mechanical.

May 3, 2004 | 07:12 PM

Ken00

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You need to enable your email, no one can get it unless you reply to them.

Did you check out the link I have in the tech info thread on the TFI system, that might help too.

May 4, 2004 | 05:07 PM

skidd

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sorry my email is skid@wightman.ca

May 4, 2004 | 05:12 PM

skidd

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Ok I can`t give you my address because I must be a member for 15 days and have 15 posts I am and have but haven`t been on for a long time and forgot my loggin and password so I re registered. I`ll check out your tech link and hope for the best