Chugging while at cruising speed.
#1
Thread Starter
Senior Member
True Car Nut
Joined: Feb 2005
Posts: 3,014
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From: Brampton, Ontario
Chugging while at cruising speed.
Car is a 95 SSEI.
Problem while at cruising speed, let'* say 40 mph, it runs as if I'm releasing the throttle and reapplying it to the same rpm. In other words it'* jurking or chugging and it'* steady as long as I have it at cruising speed. The more I apply throttle the less the problem. If I apply up to 1/2 throttle or more it goes away.
What I have done to the engine just before this happened.
Changed */C coupler
Replaced plugs, TR55
Changed engine oil & Filter
Replaced UIM and LIM gaskets
Replaced air filter.
GM O2 sensor
Throttle Positioning Sensor.
All Vacuum lines replaced
It'* showing a code which is to replace the IAT sensor which I have on order.
Any suggestions?
Problem while at cruising speed, let'* say 40 mph, it runs as if I'm releasing the throttle and reapplying it to the same rpm. In other words it'* jurking or chugging and it'* steady as long as I have it at cruising speed. The more I apply throttle the less the problem. If I apply up to 1/2 throttle or more it goes away.
What I have done to the engine just before this happened.
Changed */C coupler
Replaced plugs, TR55
Changed engine oil & Filter
Replaced UIM and LIM gaskets
Replaced air filter.
GM O2 sensor
Throttle Positioning Sensor.
All Vacuum lines replaced
It'* showing a code which is to replace the IAT sensor which I have on order.
Any suggestions?
#4
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True Car Nut
Joined: Feb 2005
Posts: 3,014
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From: Brampton, Ontario
Originally Posted by 1993 SLE
i see that the plugs were changed......what about the wires??
It ran good when I brought it home after purchasing the car, so I didn't replace the wires.
Bill........pm sent.
#6
Originally Posted by MNwonderboy
i had similar problems with my honda, found out the ignition timing was off..
#7
Im thinking the plug wires might be a good place to start.
First check them to make sure they arent contacting anything that might cause a problem, like the O2 sensor wiring or the like.
I was in a similar situation after replacing the UIM on my old car, we changed the plugs but not the wires and it started having similiar symptoms, replaced the wires and they went away.
First check them to make sure they arent contacting anything that might cause a problem, like the O2 sensor wiring or the like.
I was in a similar situation after replacing the UIM on my old car, we changed the plugs but not the wires and it started having similiar symptoms, replaced the wires and they went away.
#9
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Joined: Feb 2005
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From: Brampton, Ontario
Originally Posted by BillBoost37
Good point LH..
Double check to make sure one isn't resting on the O2 wiring.
Double check to make sure one isn't resting on the O2 wiring.