mr2-digest Friday, 8 December 1995 Volume 01 : Number 056 Why won't this '85 idle after 65 mph driving? Re: mr2-digest V1 #54 ---------------------------------------------------------------------- From: uunet!fnal.gov!demaat Date: Thu Dec 07 10:43:37 1995 Subject: Why won't this '85 idle after 65 mph driving? We just got my wife's '85 MR-2 back from the shop where we had to have the head gasket replaced. We'd like to keep the car for a while so we went ahead and had a valve job done as long as the head was off and compression was on the low end of the scale. But now it won't idle after expressway driving. When cold, the engine idles at 1600 to 1800 rpm. When it warms up, it settles at about 800 rpm around town. This is just what the service manual says it should be. However, when I drive it on the tollway for 15 minutes at 65-70 mph, the engine dies at the toll booth. I can immediately restart it and I can keep it going by keeping pressure on the accelerator but it won't idle on its own.. After a minute or two around town it gets back to 700 or 800 rpm idle. I noticed that when I push in the clutch and let off on the gas the rpm will dip to about 500 before settling at 800. (This could be normal. I don't know) Is there a particular system on the car that would be responsible for this behavior or is it likely that some part(s) on the 10-year old engine are just worn and I should simply raise the idle a bit and live with it? I would prefer to not let the shop do more work if there isn't likely to be an obvious cause. I don't see a symptom like this listed in the Toyota or Haynes manual. It's a normally aspirated engine. Bob DeMaat demaat@fnal.gov Husband of Jan, the '85 MR-2 owner/operator ------------------------------ From: uunet!flute.aix.calpoly.edu!jhosee Date: Thu, 7 Dec 1995 09:57:24 -0800 (PST) Subject: Re: mr2-digest V1 #54 > From: aly abulkheir > Date: Thu, 7 Dec 1995 03:44:44 -0500 (EST) > Subject: Ignition Amps (fwd) > Also, I noticed they sell an upgraded coil with this. Does a coil > upgrade add anything more to an ignition amp upgrade? Or is it a waste of > $50? I coil steps up the voltage level over the factory coil. I think this particularly important for cars running high compression/forced induction/NOS. The amount of spark energy jumps up really high -- and the stock coil may not deliver enough to make the sparks jump the gap. In normally aspirated modifications, I think it will help -- but not a lot. CDI and MSD are the essential cool features. :) - - Jeffrey ------------------------------ End of mr2-digest V1 #56