H4Inf

I've posted on this problem before, however some things have changed since, I have worked through more potential causes.

First of all I had an electrical problem, which I sorted out. Ran new earths and a new 70amp lead from alternator to battery.

Now the problem is still occuring. Basically when the engine has had a thrashing, afterwards say your sitting at the lights and u about to go. Push on the pedal. The engine doesn't respond for a second, then u hear it backfire and the revs come up.

This only happens when the car is warm.

The fuel pump is new. The fuel hose is new. Dizzy rotor and cap new. Leads good. Plugs new.

Engine has about 30000km on it.

13B EFI.
TB Mod - Only a single set of secondary butterflies.
Only secondary injectors.

The car works fine all of the time, except when its quite warm and after a thrashing it misbehaves like this.

There is also a really strong bad smell when this occurs, which I believe comes out the exhaust. (got leaks so I can always tell whats going on)...

One thing which I'm thinking about is the OMP. It works, but I don't have a linkage to connect it to the TB, so its jammed on halfway. I'm just thinking that perhaps at high rpm, the engine isnt getting enough oil injected and thus suffering...

After this problem starts happening, it doesnt really go away until the next morning, or after a long break.

I was guessing that compression was failing due to a lack of oil, and once the oil all dries up once, its hard to resupply it and gain that compression back... I really aren't sure so just trying to test things out one at a time and find out whats causing the problem.

SO to summarize:

Symptoms:
-Going from idle to acceleration there is a hesitation, backfire then the engine revs come up.
-After fairly high rpm there is quite a strong very bad smell (from the exhaust), much worse than normal fumes.

Any thoughts or ideas at all would be great! Need to sort this one out!

Cheers!

Paul.

Kentetsu

Can you better describe the smell from the exhaust?

Other than that, I would say check your timing....

H4Inf

The smell from the exhaust. It's not sweet. When you breathe it you wonder how many more days you will last after breathing it... Good way to lose weight...from your brain. It's just a really thick strong awful harsh smell.

I wasn't aware timing changed with temperature.. its elec dizzy and it's not locked...

This problem only occurs after it's been thrashed.

Thanks

Kentetsu

Sorry, I should have been clearer. Heat can affect the ignitors and coils. Check your timing while it is acting funny to verify that both leading/trailing are still functioning correctly.

John64

Your OMP will have no effect on what your talking about. Now you could also have a vacuum leak that one of the seloinoids sees only when it need vacuum. If you have yet to do it, replace all of the hoses.

Bob Holton

Fuel filter. always look there first.