Misfiring under load.

[dnt1010]

I had a 97 and it destroyed distributor caps on a fairly regular basis, (well it was driven +50k
per year so once a year a new cap LOL) that would be my first move to swap on a new distributor cap.
The design was very prone to cross firing inside, when you take it off look for carbon tracks inside. Takes about 10 minutes and most likely your problem will disappear.

 

[YukonGTmaster]

Have a good look at the spark plugs again. When I had my intake leak, the plugs would foul up so badly, the gap was completely bridged with crud.

 

[Holt50]

First of all the insults came after this guy well was being a better than you and your stupid in so many words kinda dick.
Soooooooo yeah I'm gonna say something. Anyway truck is running like a champ again for no reason just stopped misfiring. Probably because I had a long talk with her. Anyway thank you everyone who tried helping me very appreciated

 

[B-train]

The weather can have an impact kn bad ignition components. Rainy weather will make them worse, etc. Since it cleaed up, use the info given here and keep a mental note of what, why, when, how.....

Best of luck

 

[Holt50]

The funny thing will maybe not to funny is that it still comes and goes

 

[Holt50]

Now I'm thinking it could be it only happens when I'm low on fuel. It started again this morning then it was getting worse I stop got fuel now it's fine.

 

[Holt50]

I had a 97 and it destroyed distributor caps on a fairly regular basis, (well it was driven +50k
per year so once a year a new cap LOL) that would be my first move to swap on a new distributor cap.
The design was very prone to cross firing inside, when you take it off look for carbon tracks inside. Takes about 10 minutes and most likely your problem will disappear. View attachment 377438

I'll do that today when I get home. I have to change my temperature sending unit. So I'll do that also thanks

 

[Fless]

Might be good to take some fuel pressure readings. One with key on, engine off (KOEO) and maybe monitor the fuel pressure while driving it to see what the FP is doing when it misses. If it has a fuel filter, has it been changed?