ok guys, I've posted about this before, but i'm about to sit down tonight and take a look at what all could possibly be a problem so give me ideas. when i start driving, my car is bogging down really really bad. I'm not sure that describes how bad, it's pretty horrible. mostly on acceleration too. i used to be able to top out around 110mph, now max is like closer to 90. when i accelerate it feels like someone is jerking their foot on and off the gas. Tonight I am going to take the cat off and see if it runs better. thing is, it barely idles poorly at all so i doubt it's the cat. any ideas? I know i have a very very minor compression leak, but it's not enough to affect it on this scale i don't think.
Here is what i've replaced and know is not the problem:
new sparkplugs
new wires
new grounds
new rotor and cap
new fuel injectors

 

try to clean iacv, check spark plug wires firing order, and when was last time u replace fuel filter and inspect timing belt, see if there is a teeth off or tming belt is damanged and old ?

 

Is the CEL ON?

You might want to check whether the ignition timing is set to specification.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RonJ@HT &raquo;</TD></TR><TR><TD CLASS="quote">Is the CEL ON?

You might want to check whether the ignition timing is set to specification.</TD></TR></TABLE>
car wont idel or drive that rough even ignition timing is off

 

sorry, ignition timing is fine. spark plug wires firing order is correct, fuel filter is brand new. so far i plan on checking the cat and timing. crazy guy, i'm going to clean the iacv anyway just cause i have seen that you know your **** on here and i respect your ideas, but i doubt that would make it bog down at 65 mph in 4th gear. Also, i think that would make it idle very poorly and as i said, it idles a little rough, but it's not that bad.

 

If the cat and timing belt turn out to be fine, other possible causes worth considering are a faulty MAP sensor, TDC/CRANK/CYL sensor, or fuel pressure regulator.

 

it's not the map, just replaced that. what is a CYL sensor? sorry for the ignorance.

 

The three sensors are part of the distributor assembly. These descriptions are taken from the service manual: