Why does my engine run rough at idle?
Why does my engine run rough at idle?
This can also have a result on the muffler system again vastly restricting the exit performance of exhaust gases (engine). Excess carbon build up can cause the EGR valve to stick open allowing intake pressures to drop and the engine to stall at idle and run rough.
Why is the EGR valve at idle not working?
This could be caused by one of two possibilities… either the EGR solenoid is defective or the vacuum hose is attached to the wrong port on the EGR solenoid. Resolving this ‘continuous vacuum to the EGR valve at idle’ problem will solve the EGR valve and rough idle issue.
What to do if your fuel injector is rough idle?
Another option is to try to clean your fuel injectors with a fuel system additive like Techron, or something similar. While an additive may or may not have much effect on your rough idle problem, you can consider this as a last-ditch effort before visiting your mechanic. Follow the directions on the product’s label.
What causes an engine to run too rich in fuel?
If this is faulty and telling the engine control module to add more fuel, even if the air-fuel ratio is good – it may cause a rich fuel mixture. A faulty O2 sensor can cause the engine to run too rich.
What kind of V8 did the 1991 Firebird have?
Previously ASC converted cars for customers but it had never been through GM. The ’91 Firebird convertible was available with the LHO 3.1L V6, the L03 5.0 V8, and the LB9 5.0 V8. Production improvements led to use of new body sealants that added to the rigidity of the body.
What causes a car to have a rough idle?
The engine can run too rich or too lean. A too-rich mixture will result in poor fuel economy. A too-lean mixture will cause a rough idle. Solution: Since the oxygen sensor is part of the emissions system, its failure will usually trip a trouble code in the engine computer.
What was the Firebird Trans Am in 1991?
Trans Am and 1991 Firebird Formula receive new fiberglass constructed flat wrap-around wing spoilers. Firebird Formulas ordered with the PW7 Diamond Spoke Aluminum Wheel made it possible to, once again, order a L98 car with factory T-Tops. The new styling brought higher sales, up from 1990’s sales.
What kind of spoiler does a 1991 Trans Am have?
Trans Am and 1991 Firebird Formula receive new fiberglass constructed flat wrap-around wing spoilers. Firebird Formulas ordered with the PW7 Diamond Spoke Aluminum Wheel made it possible to, once again, order a L98 car with factory T-Tops.
