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Paul Workman · 07-10-2017

If it hadn't been said already, I'd be looking at injectors.

If I'm not mistaken, Dynomite (Cliff) has one of my posts from like 8 or 9 years ago in his SOLUTIONS archive with a color graphic showing the pin-out for the injector relay connectors. From there you can measure the resistance of the injectors to determine which (if any) are bad.

And, to Steve's point, does your fuel contain alcohol? And, too, my injectors were replaced when I bought the car...with New Old Stock (NOS) injectors. Two years later I was having what sounds like the same idle issues your are PLUS some full throttle issues as well, also related to the bad injectors.

Get the motor up to operating temperature before measuring the resistance (to avoid a temporary "normal" reading), and then measure the resistance of each injector (coil).

And, by the way... What you're experiencing doesn't sound like anything too difficult to fix!

07-10-2017	#4
Paul Workman Join Date: Nov 2007 Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri Posts: 6,466	Re: Injector issue with 1990? If it hadn't been said already, I'd be looking at injectors. If I'm not mistaken, Dynomite (Cliff) has one of my posts from like 8 or 9 years ago in his SOLUTIONS archive with a color graphic showing the pin-out for the injector relay connectors. From there you can measure the resistance of the injectors to determine which (if any) are bad. And, to Steve's point, does your fuel contain alcohol? And, too, my injectors were replaced when I bought the car...with New Old Stock (NOS) injectors. Two years later I was having what sounds like the same idle issues your are PLUS some full throttle issues as well, also related to the bad injectors. Get the motor up to operating temperature before measuring the resistance (to avoid a temporary "normal" reading), and then measure the resistance of each injector (coil). And, by the way... What you're experiencing doesn't sound like anything too difficult to fix! Last edited by Paul Workman; 07-10-2017 at 08:17 AM.