What can cause a SSEi to be slow? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 05-08-2006, 06:44 PM   #1
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Default What can cause a SSEi to be slow?

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
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Old 05-08-2006, 06:46 PM   #2
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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.
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Old 05-08-2006, 06:47 PM   #3
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Quote:
Originally Posted by Mortehl
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.
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Old 05-08-2006, 06:48 PM   #4
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Quote:
Originally Posted by Hans
Quote:
Originally Posted by Mortehl
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
Okie dokie. I just wanted to toss it out there.
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Old 05-08-2006, 08:50 PM   #5
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Getting any belt slippage on the super?????
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Old 05-08-2006, 10:08 PM   #6
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Old 05-08-2006, 10:12 PM   #7
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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.
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Old 05-08-2006, 10:13 PM   #8
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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.
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Old 05-08-2006, 10:21 PM   #9
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Also gotta figure in mileage and age. She might just be tired.
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Old 05-08-2006, 10:41 PM   #10
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Wow, I guess that is pretty sluggish. Mine is alot quicker than that, but that'* probably because it'* a 94.
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