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'87 LH2.2 retrofit: non-start question 200

posted by  rob02 on  Wed May 9 14:08 CST 2007
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last visit: Fri Jul 6 16:13 CST 2007
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I have just setup a 2.2 LH system on my BMW 2002, and am now trouble shooting the non-start situation I have. (I haven't had this running on my car, but I got this crazy idea from another '02 head who setup a 2.2LH system on his points fired and pertronix fired system. So I know it will work on my setup with pretronix) I've just come across a stumbling block... I have spark, and the fuel pump tests fine, it's just that I don't have enough volts from my coil to trigger the ECU to get fuel.

Going by the Bentley manual (LH-2.2 System Electrical Tests, p. 241-13 and 14), all components/circuits test out fine EXCEPT the engine rpm signal. (Only other slight variances I'm showing are the AMM readings which will be adjusted and throttle position sensor, which shouldn't affect my rpm signal). Sooo... I'm supposed to get approx 12 volts DC from pin 1 (from the coil negative) with the ignition on. Instead, I'm getting 1.1 volts. (all other components that are supposed to show battery voltage during the test check out fine). My lead from coil negative (red coil w/ resistor) to the harness shows no resistance (haven't checked all the way to the ECU connector). So I don't know what is going on.

Any idea why I'm getting 1.1 volts from my coil? Am I missing something here?

Thanks for any light you can shed to this.






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