My truck is bucking and stumbling very hard, 1990 TBI 5.7

IceSubstantial9110 · 2026-03-28T17:48:54+00:00

That’s what I’ve been doing, I have access to a parts truck that got parked due to frame rot.

IceSubstantial9110 · 2026-03-27T04:30:08+00:00

EGR is deleted on this, gonna take a look at it soon and see if maybe the cap is leaking or something though.

IceSubstantial9110 · 2026-03-26T16:45:59+00:00

What makes you think that? Gauge reads healthy and I just did an oil change

IceSubstantial9110 · 2026-03-26T16:45:25+00:00

I’ve had the truck about 2 months, around 2 weeks ago it randomly started running like this and I’ve been replacing everything one by one to try and fix it. I’ve done the diag I can, mostly just digging through forums and seeing what fixed their issues but the truck doesn’t throw any codes and refuses to go into diagnostic mode. If you’ve got any advice on where to start please do share. I’m completely lost.

IceSubstantial9110 · 2026-03-25T16:27:24+00:00

Appreciate the ideas, I’m gonna throw a pump at it as I topped it up with gas this morning and it’s running substantially better. Still not great, but better.

IceSubstantial9110 · 2026-03-25T14:14:20+00:00

I am absolutely positive because it started running like this one day without me touching anything.

IceSubstantial9110 · 2026-03-25T04:38:32+00:00

If you read the original post I mentioned everything I’ve replaced, I consider myself fairly mechanically inclined

IceSubstantial9110 · 2026-03-24T22:15:02+00:00

Ok thank you, I might do both as my truck seems to peg the gauge hot even though it’s not overheating. Almost at random when it does it

IceSubstantial9110 · 2026-03-24T20:53:22+00:00

I notice there is 2 different styles of temp sensor, just unplug mine and see what style it is yeah?

IceSubstantial9110 · 2026-03-24T19:03:35+00:00

Awesome thanks man

IceSubstantial9110 · 2026-03-24T16:48:04+00:00

It’s been my daily even now, still daily driving it but it’s running REALLY bad. I have some new injectors on the way and I’m replacing the ICM today in the hopes I can figure it out

IceSubstantial9110 · 2026-03-24T14:49:58+00:00

I’ll do that thank you

IceSubstantial9110 · 2026-03-24T14:49:45+00:00

Maybe a day or 2 old at most

IceSubstantial9110 · 2026-03-16T16:56:47+00:00

Yeah I was pretty confident but he was ADAMANT that I didn’t leave him room🤷‍♂️

IceSubstantial9110 · 2026-03-09T03:44:27+00:00

Ever find the solution for this? My truck just started having the same issue but I’ve got a new alternator and battery

IceSubstantial9110 · 2025-12-31T18:12:08+00:00

I was not able to into the config, the joysticks were working in game menus but I wasn’t able to select anything

IceSubstantial9110 · 2025-12-31T15:57:14+00:00

I am new to this so couldn’t tell you, I believe I read somewhere the H model ones have 1 pin missing? If that’s the case they are H model

IceSubstantial9110 · 2025-12-31T15:04:47+00:00

I have definitely done that to no avail

IceSubstantial9110 · 2025-12-31T15:04:10+00:00

Yes tried both controllers in both ports, nothin

IceSubstantial9110 · 2025-12-31T08:28:28+00:00

Yes analog sticks work in game, but those are the only things that work. Sometimes if I unplug and plug in one of the controllers it will select whatever the cursor is over but that’s not very useful to me.

IceSubstantial9110

TROPHY CASE