I have a question regarding my Chevy Blazer- it only goes -30 to 40 mpg. shifts smooth and RPM at about 3000 is the most it will go- we haven’t changed tran filter and fluid yet- we are going to this weekend annd put some Tran X in it to see if it helps- any other ideas.
Howdy
You mean it will only go 30-40MPH? If all you can get out of the engine is 3,000 RPM I would suspect a problem with one of the following:
1. Lack of fuel pressure and volume .weak fuel pump, restricted fuel filter
2. Restriction in the exhaust system stopped up catalytic converter or muffler not allowing engine to exhale
3. Ignition timing is way off jumped timing chain distributor is loose and has moved,
4. engine oil pump is restricted or not pumping engine oil and the engine is not getting proper lubrication, sometimes overheating is also a symptom
If the engine RPM will get higher, like in the red line area I would suspect a transmission slipping issue. From the little bit of your email, I don t think you have a transmission issue.
Blessings,
Austin Davis