I have a 97 EX 2.7 with a 135k miles. Once the engine warms up the tach begins to jump and the engine sounds as if the it is missing. At idle everything seems ok but when I accelerate all symptoms return.
Perhaps a vaccum problem???

Thanks, imcameron

 

welcome to the forum... just to make sure I understand you correctly when the tack jumps it sounds like the engine is following suit? I know someone had a similar issue and it turned out that he just need a tuneup (cap, rotor, plugs, wires etc). Do you have any check engine lights or anything on?

 

Thanks for the reply. The engine looses power when the tach jumps - it flutters. I recently changed the plugs and changed the O2 sensor. I did have an engine light for the sensor but not for the current problem.

 

it sounds like engine has a slight miss,,,,,,,,,,,what brand and what kind of plugs did you install?? it should be the NGK ZFR5F-11.. have you checked plug wires ? no chk engine lite correct ? did you chk the distr cap ?? And you did clear the computer after replacing the o2 sensor ,, right ?

 

Is the check engine light on?