low fuel pressure tops my list.does the cluster lamp CEL glow , keythen go out, running (idling) it mustof not that means scan me , if in usa, are you?in canada its different.this engine makes power in limhome mode.so my guess , low fuel pressure. the FPRs are failing nowthis old, btwit can stick open and pressure drops to 15psi and not 35,45psi.btw , that was guess, and as most guesses, useless.i do the tests, and least the results tell me truth.i can rattle off, 10 top reasons or or even 50 , inside engine.Low power has many causes, does it help guessing?there are like 1 to 10 tests, to do and bam, cause.folks that love to guess, send endless useless cash.
http://www.fixkick.com/power-index.htmlI i can tick off many top causesyour engine dont read my list it does what it wants. fate, miles, abuse, bad service, endless this topic. truely.1: needs a tuneup.,2: compression (cyl) low, its and old car.3: maf dirty4: low fuel pressure FPR , is toasted.5: cat melted.6: huge vacuum leak , in the main induction and Air fuel ratio goes super lean.that top pipe for air on top engine loves to failand large number of ways, and all LEAK AIR.I seen over 10 like this. even broken mount to it and sucking air like mad.those are the top fails as is a slipped timing beltbut that is part of the tuneup, its replaced at 60kmiles, if you skip this service point it fails.it slips and compressing drops by 1/2 and so does power. seen 100s like that.why not just get car serviced if you dont own mech. tools?