1988 F150 Lariat - Idle Problem
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1988 F150 Lariat - Idle Problem
1988 F150 Lariat - 302 V8 - FI, PS, PB, AC.
Engine starts fine, high temporary idle, dropping close to normal after a warm-up period. But after a small period of running around town, releasing the gas pedal results in the idle dropping so low that the engine actually stalls (No power steering etc). Reminded me of a TPS failure of a couple years ago.
Cleaning the throttle body, etc. TPS was replaced two years ago. All readings conflict with the Haynes manual but are identical with a new TSP... going to reuse my two year old TSP.
The IAC readings, according to the Haynes manual.... wiring harness to solenoid, key ON, engine not running, I should have 10.5v at the wiring harness connector, This connector has two red wire terminals... I get 10.5v out of one terminal, nothing from the other terminal. Is this okay?
The IAC solenoid.... The Haynes manual states the resistance should be between 7 to 13 ohms. I'm assuming that would be between the two terminals of the solenoid? My meters (tried more than one) peg the needle like a dead short.
Need a litle guidance here. Some Haynes instructions conflict greatly with various areas of the Internet.
Engine starts fine, high temporary idle, dropping close to normal after a warm-up period. But after a small period of running around town, releasing the gas pedal results in the idle dropping so low that the engine actually stalls (No power steering etc). Reminded me of a TPS failure of a couple years ago.
Cleaning the throttle body, etc. TPS was replaced two years ago. All readings conflict with the Haynes manual but are identical with a new TSP... going to reuse my two year old TSP.
The IAC readings, according to the Haynes manual.... wiring harness to solenoid, key ON, engine not running, I should have 10.5v at the wiring harness connector, This connector has two red wire terminals... I get 10.5v out of one terminal, nothing from the other terminal. Is this okay?
The IAC solenoid.... The Haynes manual states the resistance should be between 7 to 13 ohms. I'm assuming that would be between the two terminals of the solenoid? My meters (tried more than one) peg the needle like a dead short.
Need a litle guidance here. Some Haynes instructions conflict greatly with various areas of the Internet.
Last edited by Joe Reeves; Jun 28, 2017 at 05:16 PM. Reason: Inserting proper information.
Thread Starter
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Joined: Sep 2013
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Possibly I am doing something offensive and not realizing it? I'm thinking I'd have some sort of reply by now... perhaps I am being impatient? Sure could use some advice on this post as I am obviously over my head here. (Joe)
