stalling and rough idle
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New User
Joined: May 2003
Posts: 3
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stalling and rough idle
i have a 92 ford bronco with the 5.8 i am having problems with it stall at stop lights and idle and it floods when you try to start it. also its idle is messed up. it doen't stay at a constant RPM it bounces between 900-1200 RPMs. this all started when i cleand the thottle body. since cleanin the thottle body i have replaced the TPS, fuel pressor reglator, EGR valve, the EGR position sencer, and the O2 senser. i have run out of ideals and any help would be great.
Posting Guru
Joined: Jul 2002
Posts: 2,205
Likes: 1
From: Vancouver WA
stalling and rough idle
How did you clean the throttle body? There have been a number of posts claiming that spraying cleaner into the TB can cause damage to the gaskets resulting in a vacuum leak. That's what it sounds like your problem is to me. Get a short piece of hose, put one end to your ear, and move the other end around all the intake gaskets while the truck is running. A leak will sound like a hissing or sucking noise.
Fleet Mechanic
Joined: Aug 2001
Posts: 1,526
Likes: 0
From: Round Rock, TX
stalling and rough idle
When you replaced the TPS, did you adjust it correctly? Using a multimeter with one probe on the green wire from the TPS and the other probe on the ground, you want to see 0.99V. To adjust it, loosen the screws on the TPS and rotate it until you get the correct voltage.
But that's a secondary problem since it happened after you cleaned the TB.
But that's a secondary problem since it happened after you cleaned the TB.
