Why does my car have no power while driving?

Asked by Aug 27, 2014 at 11:07 AM about the 1993 Saturn S-Series 4 Dr SL1 Sedan

Question type: Maintenance & Repair

I replaced my piston rings,all gaskets including the intake manifold gasket,fixed all
vaccum leaks,new plugs and wires,new coolant sensor and wire plug,new pcv
valve,coolant flush and got the air bubbles out,new egr valve,map sensor,checked all
relays and basically overhauled the whole engine. The problem was the same even
before doing everything to it. It has some power when I initially take off driving but soon
cuts out and starts kind of bogging. I am at a loss as to what the problem is and im
trying to avoid taking it to a mechanic and having a diagnostics test done as I have
stuck so much money it it already

9 Answers

143,265

Did you new put 02 sensors in? Could be stuck in open loop and when warmed up runs too rich.

2 out of 2 people think this is helpful.
78,225

Also you might check the exhaust back pressure, if it can't breathe it won't run properly.

1 out of 1 people think this is helpful.

What's the exhaust back pressure? And yea I was thinking the o2 sensor to but ive been hesitant to buy one since it's 50 some odd bucks and I would be taking a chance that it is the problem. Doesn't autozone test o2 sensors for free?

78,225

If you have a restriction in the exhaust system it can't get rid of the exhaust so the engine can't breathe, so it won't rev up, won't pull a load, low or no power. I don't know if autozone can test them, I know the one here can't, but every place is different.

143,265

Yes an 02 sensor can be tested. You need a good scanner or a multimeter... ...http://www.ehow.com/how_5193043_test-sensor.html... ..https://www.youtube.com/watch?v=YL6xkOZxHZ0 .....https://www.youtube.com/watch?v=QM2jO0_Cah0 ... https://www.youtube.com/watch?v=7uqmYkl7t0c

143,265

And no Auto zone will not test it. And they are not returnable

1,415

pull the primary o2 sensor out of the manifold. If the car runs better, its your cat. Post any trouble codes youre throwing.

try to check the return system the fuel system..clean the fuel line..last option is trasmition the disc ..replace

10

Alex how do I pull the primary o2 sensor out of manifold

1 out of 1 people think this is helpful.

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