Took about 3 days to figure this out.  Engine ran fine otherwise, no check engine light or anything.  Found out that the wire for the idle switch (blue/yellow wire off of TPS) will rub and short to ground - that’s when the computer thinks you are coasting with the foot off the gas so it cuts fuel (Spark will be there all the time) until it is able to get back down to 1400 rpm.  Just run another wire to the computer and all will be well agian!
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Tip: Engine will rev up to 2300 RPM than cut out until 1400 RPM
Vehicle: 1991 Toyota Previa DX
Category/Subcategory: Engine Performance / Testing and Diagnostics
Title/Heading: TESTS W/O CODES / SYMPTOM DIAGNOSIS
Posted By: Matt A.
Shop: 10 MILE TELEGRAPH BP AMOCO
Date: 3/24/2009

This entry was posted on Wednesday, April 15th, 2009 at 4:33 pm and is filed under March 2009 Winners. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.