Try alldata.com. The check the fuel pressure when it backfires.
More like cease fire injection..Charlieman2 said:I have a 1984 Corvette 5.7 L with Cross Fire Injection
This will be carbon from the backfire(s).I have a 1984 Corvette 5.7 L with Cross Fire Injection
The engine seemed to be running good, but backfired once or twice in the next 500 miles.
when I removed the air cleaner, the throttle bodies and injectors were covered with a black carbon film.
What does the vacuum hose routing on the emmission decal on the hood show?I referred to my Chilton manual on the emission vacuum system and found that my engine’s PVC routing was different.