Engine on 1990 Jeep Wrangler

Why is engine sputtering at high speeds? Oxygen censor has been replaced, tune-up has been done. Thank you if can help me out.

by in Las Vegas, NV on April 14, 2009
2 answers
ANSWER by , April 15, 2009
You should have the fuel pump (pressure and volume) checked and the ignition system. Either of these could be your problem. Also have them check for a plugged exhaust system.
ANSWER by , August 03, 2010
Check spark plugs and lines. I had a similar problem and this solved it on my 2000 Wrangler.