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Re: 90 350 TBI wont idle down.
More specific information is needed.
Which coolant sensor code or codes were stored? What number?
Does it still set the trouble code when it is driven?
Did you change the ECM?
Is the ECM in the truck the original?
Did the truck have a 350 in it before the swap?
Have you checked for vacuum leaks?
Have you tried pinching off the vacuum hose to the brake booster?
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For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If it is modified from what came stock from the factory, let us know that too.
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