Vince's TBI woes, progressive revelations, and tbi mods.

[82sbshortbed]

Here ya go. Replace that 300k dizzy with one of these.

https://www.skipwhiteperformance.co...lete-distributor-with-super-cap-6500-r_93639/

 

[AuroraGirl]

you think ignition? high possibility, heat is killer to those.

 

[Vbb199]

you think ignition? high possibility, heat is killer to those.

333,000 miles also has a tendency to wear one out.

 

[1987 GMC Jimmy]

I would still keep the OEM off to the side and rebuild it for later. I have a Spectra one, and they’re solid, but it’s not as stoutly built as OEM. Plus, those non-OEM ignition modules and pickup coils don’t exactly have a reputation for excellence.

 

[Vbb199]

I would still keep the OEM off to the side and rebuild it for later. I have a Spectra one, and they’re solid, but it’s not as stoutly built as OEM. Plus, those non-OEM ignition modules and pickup coils don’t exactly have a reputation for excellence.

Thats what ive understood, namely the modules. My last module quit and i just tossed in another from a OEM dist.

 

[shiftpro]

So, that said, does anyone have any experience with those accel distributors?

Accel, wow high performance is what comes to mind. Junk from China is the reality. I had one go for a crap after a few years of use. The
mechanical advance broke a weight pin off. I also noticed the vacuum advance was beginning to stick, not returning and therefore my static timing was too high. This engine was on propane so I didn't notice any pinging... would have been more obvious I think with a gas engine.

 

[Rusty Nail]

1st thought - fuel filter
2nd thought - knock sensor/timing advance (module)

 

[Vbb199]

1st thought - fuel filter
2nd thought - knock sensor/timing advance (module)

Fuel filter and knock sensor replaced not long ago.


esc module however could be going bad tho

Knock sensor was causing timing issues like, 3 months ago.

Wasnt functioning at all when the ECM did its self test, causing it to go into just...."base timing" mode.... i replaced that bad boy .

 

[Vbb199]

Accel, wow high performance is what comes to mind. Junk from China is the reality. I had one go for a crap after a few years of use. The
mechanical advance broke a weight pin off. I also noticed the vacuum advance was beginning to stick, not returning and therefore my static timing was too high. This engine was on propane so I didn't notice any pinging... would have been more obvious I think with a gas engine.

I appreciate the input on those.

 

[Vbb199]

Ill swap out ESC's this evening with the 2 spares i have and see if anything changes.


Dont see how considering it just advances timing, but ill try.

 

[Rusty Nail]

More correctly my first thought was fuel filter
Second was ignition module but it seems unlikely
The third thought is knock sensor...hear me out yo.
....I wager since it has been performing acceptably well throughout the warm summer months, the change now has been brought about by the change to winter blend fuels.

This happens and is reality, the gas fornula changes. Furthermore, in effort to fix cars on the internet for NOTHING I vote you simple unscrew the knock sensor a turn or two..to desensitize it and post the results.
If it were the module, it would do it it every gear, not only top gear.

I bet if you take a turn out of the knock sensor that'll fix it.

No problem. Boom! Fixed.

xc_hide_links_from_guests_guests_error_hide_media

 

[Vbb199]

More correctly my first thought was fuel filter
Second was ignition module but it seems unlikely
The third thought is knock sensor...hear me out yo.
....I wager since it has been performing acceptably well throughout the warm summer months, the change now has been brought about by the change to winter blend fuels.

This happens and is reality, the gas fornula changes. Furthermore, in effort to fix cars on the internet for NOTHING I vote you simple unscrew the knock sensor a turn or two..to desensitize it and post the results.
If it were the module, it would do it it every gear, not only top gear.

I bet if you take a turn out of the knock sensor that'll fix it.

No problem. Boom! Fixed.

xc_hide_links_from_guests_guests_error_hide_media

Im willing to try that, i know theres a torque spec, im just unsure of what it is.

I didnt give it any ugga dugga's

 

[Rusty Nail]

It'll work - if that's the issue.

They'll only go in so far, if you bottomed it out? Thats probably why and how it will work.
Your next option is to retard the base timing.

When hotrodding (i.e. nitrous tuning) I learned that one could use teflon tape on the knock sensor thread to further desensitize them if necessary. I have since applied Perma-Tex brush-on gasket sealer to those threads in my IROC for example, to achieve that desired result.
I dont know the torque spec but for guys like us, it really only needs to be in far enough to stop the oil leaking - hence the gasket sealer.

Thats my opinion based in experience and THIS IS the internet...

 

[Vbb199]

It'll work - if that's the issue.

They'll only go in so far, if you bottomed it out? Thats probably why and how it will work.
Your next option is to retard the base timing.

When hotrodding (i.e. nitrous tuning) I learned that one could use teflon tape on the knock sensor thread to further desensitize them if necessary. I have since applied Perma-Tex brush-on gasket sealer to those threads in my IROC for example, to achieve that desired result.
I dont know the torque spec but for guys like us, it really only needs to be in far enough to stop the oil leaking - hence the gasket sealer.

Thats my opinion based in experience and THIS IS the internet...

I do appreciate the input, i know how the sensor works, but i didnt give thought into screwing it in too far and it detecting minor issues ..


Good stuff to know.

 

[jake wells]

A worn distributor drive gear can cause these problems as well.