SPONSORED LINKS

350TBI engine

Tiny
TRISTANBOYD
  • MEMBER
  • 1994 CHEVROLET SILVERADO
  • 142,000 MILES
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.
SPONSORED LINKS
Sunday, January 13th, 2013 AT 8:03 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I bet you have a bad cat converter.

Have the back pressure checked.

Roy
Was this
answer
helpful?
Yes
No
Sunday, January 13th, 2013 AT 8:45 PM
Tiny
TRISTANBOYD
  • MEMBER
  • 14 POSTS
Forgot to mention, there is no cat on this truck.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Sunday, January 13th, 2013 AT 11:38 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Ok, still look for exhaust restriction in the system

Roy
Was this
answer
helpful?
Yes
No
Monday, January 14th, 2013 AT 12:06 AM
Tiny
TRISTANBOYD
  • MEMBER
  • 14 POSTS
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?
Was this
answer
helpful?
Yes
No
Thursday, January 17th, 2013 AT 4:13 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Lets start with basics. Compression, fuel pressure and spark.

Verify all 3 are good and we go from there

Roy
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, January 17th, 2013 AT 11:06 PM

Please login or register to post a reply.

Related Engine Low Power Content

Fix an Engine with Low Power!
VIDEO
Fix an Engine with Low Power!
Instructional repair video
Symptoms of Low Engine Power
GUIDE
Symptoms of Low Engine Power
The power your car's engine is producing is important. When you step on the gas you need your car to accelerate, mainly to keep you out of trouble when getting onto the...
VIEW MORE

Sponsored links