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lh2.4 warm start issue (fine cold or hot) 200 1991

posted by  machine man on  Wed Apr 3 19:49 CST 2024
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last visit: Wed Oct 22 15:40 CST 2014
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Hi Dave!

Another excellent write up you have done here!
You covered everything I could think of.

I’m with you on the Throttle Position Switch and its adjustments.
The ECU needs the heads up on whether it should idle or speed up off idle.
The transition of air flow between the throttle plates flow change over needs to bet set into the range of the IAC’s movement. It can be a head scratcher until it gets blended right.

Again you put down a real good diagnosis of that being messed with.
The throttle bore and its vacuum ports are being cheated of their due respect when it comes to the EGR or fuel evaporation system. A bad hose to that thing doesn’t help matters any. I have found them rotted just out of sight or even disconnected from splitting ends.

A little wiping of the bore and spray can cleaner through the ports is playful maintenance that we all seem to forget or get lazy with.
🥴

Phil





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New lh2.4 warm start issue (fine cold or hot) [200]
posted by  RedBrickDad  on Tue Mar 26 11:58 CST 2024 >


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