lost engine power, or transmission slips????
which is it?
the engine rpm tells you if the engine is weak or transmission slips.
2.0 liter , DOHC I4, J20 engine.
which transmission, my guess A/T box. (sounds like?) sure..
1: in drive. pointed in safe direction, say a field or ?
2: parked, hand brake and foot brake held hard and fast.
3: race engine to wide open throttle for 1 to 3 seconds.
and lift right foot. after noting RPM. quckly.
4: rpm below 2200 rpm is a weak engine , if the engine spools
wildly up to 3500 rpm or more, the transmission is bad. (slips)
this is called the stall test. (in the FSM)
2,300 - 2,600 r/min. for H25/J20 engine
stall test passes. so does the transmission reach 4th gear.
1,2,3,4? yes/ .no.
yes, the its not the transmission.
if engine power lacks in any gear, that is the engine. weak.
this post is about the engine power, (my answer)
will you change 100 more parts guessing?
why do that?, any shop can diagnose it for a fraction of your guessing.
if the trans dont slip
- over heating? the engine?
- never done a tuneup this decade?> really?
- low fuel pressure?
- low engine compression.?
- Bad MAF sensors or just dirty?
- check engine light on running?, why ignore that, scan it.
- weak spark , see #2 and 6
- leaking or clogged injectors. or stuck on, for 2 reasons.
- Intake vacuum air leaks>?
both the engine and transmissions are complex
as is the vast number of tests to do. based on previous tests and logic.
do you want to test or gue$$?