I need to know more on the throttle body fuel injection system. During idle speed mine has a chatter sound and looks like to the fuel in intermentent with the chatter
- posted
18 years ago
4.3 Chevy Van
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- posted
18 years ago
Huh? Please refrase the question so we can understand it. Thanks.
Bob
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18 years ago
Rephrasing question...During idle speed my fuel injection has a ticking sound and the fuel pulses with that ticking. Is this normal? When I rev the engine up it stops. Also I need to know has anyone had backfire problems with the 4.3?. And NO it is not out of time and it has been tuned up within the last 3 months. It acted like the engine stopped for just a second then started again while I was driving. It backfired hard enough to blow my muffler apart.
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- posted
18 years ago
Injectors 'ticking' at idle is normal.
Backfiring with a TBI engine is not. If there is a leak in the exhaust between the manifolds and the muffler, backfiring can occur. Check the manifold to pipe seals. If you have an air injected cat-converter, have the air pump system checked. It might be 'over pumping'.