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87 Bronco2 2.9 running rough

Posted: Mon Mar 04, 2019 7:56 am
by Bear73
I have not replaced anything yet because I just bought it. It runs great while cold, but when reaching normal operating temp it goes to surging like it's misfiring or has bad gas. It only does this while its warmed up. Please help

Re: 87 Bronco2 2.9 running rough

Posted: Mon May 27, 2019 12:58 pm
by broncofan
Check fuel pressure and clean or replace injectors.

Re: 87 Bronco2 2.9 running rough

Posted: Fri Apr 10, 2020 11:35 pm
by Gaz
Bear,

I would look at 2 components; the fuel filter and/or the TFI ignition module ..). The fuel filter is very easy to change and inexpensive. The ignition modules cost a bit more and are plagued by heat and in one of the worst locations, fir a heat sensitive component.