i went to look at a 92 calibra turbo last night, 68k from new, everything is perfect on it. it has been idle for 3 years, i drove it and everything seemed fine, except when i took off in first gear, hit limiter, and at about 5k rpm in second it left a massive bang out the exhaust, just a single bang, didnt seem to loose power. the management light is on from start up, and it drives fine other than the backfire. it didnt do it when i tried it a second time, but i didnt take it past 6500rpm, when i tried it a third time, and hit the limiter it did it again.
Any ideas what it might be?
thats the thing, if i was alone on the test drive id have been sorted. im going to bring down tech 1 when i go down to collect it. ive decided to buy it anyway, its in mint condition other than the misfire, hopefuly it wont break my heart trying to get it sorted.
I can always sell the dodgy engine to an unsuspecting nova owner, and ill even keep the f28lmao
we all have our methods of checking a car before we buy it, and i definitely wanted to take it all the way through the rev range.
The car wasnt completely idle, it had a full service 200 miles previous but that was almost a year ago.
Thats a great website you have johnA, after reading it, im thinking it might be caused by a distributor cap/rotor/lead.
If the car was parked outside, then after a year the oil would be dangerously useless (for a turbo). Every night the condensation becomes water and drips in the sump, mixing with the oil, diluting it.
If the car doesn't get driven (to reach operating temp) then the water stays and it gets worse night after night.
A year later, the first thing you have to do before starting it up is to change oil/filter.
Anyway, now what's done is done...