1995 Sc2 hesitation problem and high revs.
 

Hi, I have a 1995 SC2 with an automatic transmission. Lately, for the past few weeks, My car has been hesitating a lot, and sometimes chokes out when there is a load on the engine, such as when I'm in drive or reverse and stopped, such as at a red light. But when I go to put it in park or neutral, so that it doesn't conk out my engine starts to rev up to 2 to 3 thousand rpm for a little then goes back down. Also when I'm accelerating moderately it feels really weird and is shaky. It could be the trans shaking, I'm not to sure. So to get on the highway and get to a good speed quickly, I have to mash on the accelerator. It could be the Erg valve but I'm not sure. I would like to know what you think on this matter. Thanks, Luke

sounds like it may be starving for fuel when was the last time the fuel filter was changed out? the other thing I can think of is possibly the fuel pump but I'd probably try the fuel filter/egr stuff first since they don't cost as much

I have already put a new fuel pump and fuel filter a few months ago, and new spark plugs about a month or two ago.

Hopefully, you put in standard plugs, and not platinum ones

No they are standard spark plugs, I have just cleaned the throttle body and tried a new tps sensor, which didn't do anything, I blocked off my erg valve with two nickels, it didn't work, so i put in a new iac sensor which helped a but with the high revs when I put it in neutral or park. But there is still alot of hesitation and ping sometimes.

Podster
 

Sometimes high rev's mean a vacuum leak. The ECM is compensating for the loss of vacuum by increasing the RPMs