Hi all,
I'm having some tuning trouble with the 202 in my LH Torana. It is a fairly new engine (5000 since rebuild), but with the original single throat stromberg carby, and an electronic dizzy setup from a VH commodore.
It runs on Shell Optimax, as it now has hardened valve seats and boosted compression. Built by someone who knows what they're doing.
I have set it up and tuned it to run beautifully (8 degrees, nice idle, etc).
Every so often, it will turn into a dog, won't idle (dies), always starts again, but runs rough, needs throttle, and pings very badly. Sometimes this is after engine breaking down a hill backfiring and farting badly. Some choke will help it from dying as often...
If I persist like this (I was towing last night, had no choice), after ten minutes of driving, and lots of red light stalls, it'll just come good again.
Then next time I drive it, it might play up again. It's like having two completely different cars...
My initial suspicion is either the carby has some rubbish in it (carby rebuilt 7 years ago, spent 1 year off the car in a plastic bag during the rebuild), or the dizzy is playing up and the advance is getting stuck??
I'm hesitant to touch the carby myself unless people here convince me otherwise.
Other than that I'll be putting it in to have the dizzy overhauled and regraphed.
I'm in western suburbs of Brisbane - any suggestions on a tuning expert?
Any words of advice? Apologies for the novel... figured it was no use posting without sufficient information.
Cheers,
Jason.
