Producing "No Spark" symptoms- ECM bad or?
Hi all!
I'm currently working on a friends ride. '91 Galant GS. It cranks over but produces no spark. I took off the cap to the dizzy , cranked it over, and the rotor turns, so its not the timing belt. My friend is getting the coil tested today, but if that turns out OK, then what next? I've been searching on the site and it seems that these ECMs go out alot on these cars? https://www.thegalantcenter.org/styl...efault/sad.gif Where is the ECM located on a '91? Behind center console or pass. side kick panel? Does the ECM control spark to the coil? Whats an easy way to tell if the ECM is functioning properly? Thanks all.
Re: Producing "No Spark" symptoms- ECM bad or?
Quote:
Originally Posted by J-Roc
Hi all!
I'm currently working on a friends ride. '91 Galant GS. It cranks over but produces no spark. I took off the cap to the dizzy , cranked it over, and the rotor turns, so its not the timing belt. My friend is getting the coil tested today, but if that turns out OK, then what next? I've been searching on the site and it seems that these ECMs go out alot on these cars?
https://www.thegalantcenter.org/styl...efault/sad.gif Where is the ECM located on a '91? Behind center console or pass. side kick panel? Does the ECM control spark to the coil? Whats an easy way to tell if the ECM is functioning properly? Thanks all.
My guess would be the ECM. The ECM on the Galant is somewhat fragile, so it would be more likely at fault than the coil. The easiest way to tell if the ecm is at fault is to retrieve the error code, see here for details. Basically, locate the driver side fuse box and the number one fuse is the the MPI relay, which is the diagnostic port. Stick a electrical buzzer (Radio Shack #273-055 $2.49) in it and it'll start giving off pulses. see the link above on how to decipher the error code, he explained it pretty well.