akrott1

I am looking for some help on where to start diagnosing the problem I am having with my '90CQ. The engine is running rough and misses/hesitates but only when I am crusing and trying to keep the throttle constant. During acceleration or downshifting, engine sounds and runs fine. It has always idle a little rough, but nothing extreme. Car starts fine...sometimes it has to crank a little longer than others before firing, but always starts up. Idle is constant at around 900 rpm.

Any thoughts on where to start?

520

Injectors won't throw a code though - you may have to test them. Ohm them first and if all in spec then test for flow. It may be number of things though. Ignition...bad rotor, dizzy, plug wires, coil, etc.<ul><li><a href="http://www.20v.org">for pullling codes info...</a></li></ul>