350TBI ENGINE

1994 Chevrolet Silverado

Tiny

tristanboyd

January, 13, 2013 AT 8:03 PM

350TBI engine.

The truck's idle is a little rough but not bad. Driving the truck at 45mph or slower is not a problem as long as we are easy on the pedal. If we try to give it gas as to pull into traffic or drive any faster that 45ish, it sputters and bucks and seems to be missing severely. It has no power really. We have already changed the ECT sensor and tried a few different MAP sensors with no luck. We test the TPS with a multimeter and it appears to be functioning properly and now we are at a loss. Gas mileage is bad, no power and its occasionally smoking black.

FOUND 16214 RELATED QUESTIONS

5 Answers

Tiny

ASEMaster6371

January, 13, 2013 AT 8:45 PM

I bet you have a bad cat converter.

Have the back pressure checked.

Roy

Tiny

tristanboyd

January, 13, 2013 AT 11:38 PM

Forgot to mention, there is no cat on this truck.

Tiny

ASEMaster6371

January, 14, 2013 AT 12:06 AM

Ok, still look for exhaust restriction in the system

Roy

Tiny

tristanboyd

January, 17, 2013 AT 4:13 PM

We couldn't find any restricitions in the exhaust. Free flowing and loud like always. Gotta love a catless system with flowmasters. Anywho, what would you suggest us trying next?

Tiny

ASEMaster6371

January, 17, 2013 AT 11:06 PM

Lets start with basics. Compression, fuel pressure and spark.

Verify all 3 are good and we go from there

Roy

Please login or register to post a reply.

Catalytic Converter Replacement Volkswagen
Find Out How to Test Your Catalytic Converter
Fuel Filter Replacment BMW 525i
Fuel Filter Change
Fuel Filter Replacement Ford F-250