1989 90Q sluggish performance

I've been trying to fix this problem for over a year now... When I try and
accellerate it feels like something is holding my car back and will
stutter/surge (the brakes have been checked/replaced). The problem seems to
get better after warmed up a bit. Here is all I've done to try and fix it:
replaced all fluids
replaced fuel filter and pump
new plugs/wires
new distributor rotor/cap
new ignition coil
new timing and other belts
new O2 sensor
new catalytic convertor and muffler
Anyone have any suggestions on where else I should look to fix the problem?

Toby wrote:
> I've been trying to fix this problem for over a year now... When I try and
> accellerate it feels like something is holding my car back and will
> stutter/surge (the brakes have been checked/replaced). The problem seems to
> get better after warmed up a bit. Here is all I've done to try and fix it:
> replaced all fluids
> replaced fuel filter and pump
> new plugs/wires
> new distributor rotor/cap
> new ignition coil
> new timing and other belts
> new O2 sensor
> new catalytic convertor and muffler
> Anyone have any suggestions on where else I should look to fix the problem?
>
>
Well, it sounds like you have replaced all the parts that didn't cause
the problem. :-)
Is this a N/A I5?
The first thing I would look for is a vacuum leak, probably in the
intake boot but could be anywhere in the vacuum system or multiple places.
Check for a leak in the decel valve. This is located in the passenger
fender behind the fuel distributor in the44s.
Try a can of Teckron injector cleaner. Do you have a problem with poor
starting?
Let us know what you find.

yeah, it's a N/A I5 and I forgot to say that I also replaced the intake boot
to . I'll try and track all the vacuum lines and see if there is maybe a
crack in one of 'em and I'll look for that decel valve also. Thanks! I
hope this works.

Toby
"Tony" > wrote in message
...
>
>
> Toby wrote:
>> I've been trying to fix this problem for over a year now... When I try
>> and accellerate it feels like something is holding my car back and will
>> stutter/surge (the brakes have been checked/replaced). The problem seems
>> to get better after warmed up a bit. Here is all I've done to try and
>> fix it:
>> replaced all fluids
>> replaced fuel filter and pump
>> new plugs/wires
>> new distributor rotor/cap
>> new ignition coil
>> new timing and other belts
>> new O2 sensor
>> new catalytic convertor and muffler
>> Anyone have any suggestions on where else I should look to fix the
>> problem?
> Well, it sounds like you have replaced all the parts that didn't cause the
> problem. :-)
> Is this a N/A I5?
> The first thing I would look for is a vacuum leak, probably in the intake
> boot but could be anywhere in the vacuum system or multiple places.
> Check for a leak in the decel valve. This is located in the passenger
> fender behind the fuel distributor in the44s.
> Try a can of Teckron injector cleaner. Do you have a problem with poor
> starting?
> Let us know what you find.