I have replaced the following:

Spark Plugs
Plug Wires
MAF Sensor
O2 Sensor
Replaced fuel filter
K&N Intake
Cleaned the TB
Cleaned EGR Valve
Replaced PCV
Replaced cat with highflow magnaflow
Freshly Rebuilt Supercharger


However as you can see from the video my car is still slow, we are talking at least 9 seconds to get to 60.

http://cal48.com/mycarisslow.wmv
(right click save as, 6 megs)

LOOK how slow it is from 50-60, pretty sad.

Therefore I am trying to compile a list of what can be holding the car back without having a scantool.

The car runs perfect at idle, however the performance is still not quite normal.


- Exhuast Manifolds are cracked
- Failing Fuel Pump or FPR
- Vaccum Leaks

Hans, when I was having the same kinda problem (good idle, but **** poor performance), it turned out to be the TPS. Not something you can test without a scantool, but its something to consider.

It has been tested with my DMM, it shows correct voltage at idle and simulated WOT, there appear to be no "dead" spots either that I can tell. I will replace that soon enough though.

Okie dokie. I just wanted to toss it out there.

Getting any belt slippage on the super?????

Dead link. Page cannot be displayed.

Back when I had a Capri, I had bracket on the throttle cable break in such a way that floored wasn't WOT at the TB. The bracket looked fine at Idle. That was tuff for one person to figure out, but I got it.

Link Fixed.....


daman - I just replaced both belts with gatorbacks so I dont think that is the cause but could be..I am getting good boost though, probably around 8 or 9lbs. This is with the stock 2.5" pulley.

I am wondering perhaps if I have a bad fuel injector or 2.

My resistances on the coil packs are pretty close as well.

Also gotta figure in mileage and age. She might just be tired.

Wow, I guess that is pretty sluggish. Mine is alot quicker than that, but that'* probably because it'* a 94.