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Throttle and Starting issues
Posted: Fri May 28, 2010 2:30 pm
by greenmachine89
89 Bronco II 5 speed
First off when I start in the morning it revs up to 1200 then stutters, coughs and dies. When I try starting it again it fires right up. As for the throttle when applied it hesitates for a second. Any help would be great!
Re: Throttle and Starting issues
Posted: Fri May 28, 2010 5:13 pm
by bronco_lou
Pull the codes from the computer.
Re: Throttle and Starting issues
Posted: Fri May 28, 2010 6:41 pm
by Predator130
Mine is doing exactly the same thing, when you crank it cold it runs fine for 5-10 minutes, then when you barely get past the idle mark it stumbles all over itself. If you gas it or are going down the road with the pedal in it making it accelerate it runs fine. If you maintain what you are doing it starts stumbling again. I haven't ran the codes but I will tomorrow. Going to replace a fuel filter tonight and see what that does. But it seems hard for me to imagine the fuel filter is the culprit when I can gun it and run fine. Seems more like an idle sensor of some kind. Not trying to Hijack the thread just noticed similar issues and thought we could bounce ideas off each other.
Thanks
Re: Throttle and Starting issues
Posted: Tue Jun 01, 2010 9:19 am
by greenmachine89
Changed out the fuel filter, changed over to the larger throttle body from an 86 (wanted to do that for awhile now), changed the air flow sensor. I will try to pull the codes sometime today after work or tmrw. I did notice the throttle being a bit more responsive after changing the tb, but it still seems to lack the balls to get up and go. Now I know these B2s don't have much for power anyway but they have never seemed this wimpy.
Re: Throttle and Starting issues
Posted: Sat Jun 12, 2010 7:08 pm
by bronco_lou
greenmachine89 wrote:Changed out the fuel filter, changed over to the larger throttle body from an 86 (wanted to do that for awhile now), changed the air flow sensor. I will try to pull the codes sometime today after work or tmrw. I did notice the throttle being a bit more responsive after changing the tb, but it still seems to lack the balls to get up and go. Now I know these B2s don't have much for power anyway but they have never seemed this wimpy.
My 88 2.9 had plenty of balls, if it won't get up and go you have a problem somewhere.
Louis
Re: Throttle and Starting issues
Posted: Mon Jun 14, 2010 1:11 pm
by Phillippi
How about a blocked Cat?
Re: Throttle and Starting issues
Posted: Tue Jun 15, 2010 3:12 am
by Ranger Dave
greenmachine89 wrote:changed the air flow sensor.
they dont have that sensor