1999 Saturn SL2

1999 SATURN SL2
95,000 MILES • 4 CYL • FWD • AUTOMATIC
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CLANCY52
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Bad hesitation when accelerating. I just replaced the spark plugs and spark plug wires. The car runs great and idols smoothly but whenever I accelerate from a dead stop it hesitates then accelerates smoothly. When I am cruising down the road it is great unless I give it a little gas then it hiccups then accelerates smoothly again. I tripled checked all the wires and plugs, everything is as it should be. Help!
Feb 28, 2010 at 8:51 PM
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SATURNTECH9
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See if there are any codes let me know what the numbers are if u have any.it could be a few things but let's start with the codes first.
Feb 28, 2010 at 9:13 PM
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CLANCY52
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No codes. had one a few days ago "02 sensor slow to respond" but it went away. No light or code since I put plugs and wires in.
Feb 28, 2010 at 9:20 PM
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SATURNTECH9
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theres a coolant temp sensor screwed into ur head below where ur upper hose goes unplug that by squeezing it.look at the coonector if its corroded u will need to replace or clean it.its real common for the sensors to crack and leak into connectors.the sensor controls how much fuel ur engine gets the cooling fan and even temp gauge.and will cause ur engine to flood run lean surge cut out over heat alot of differnt things.there under 20 if u replace it make sure u get a brass tipped one not a plastic tipped one they crack.let me know what u find.thats where i would start.if u come up with nothing there then I would check ur fuel pressure next.as far as ur p0133 u will need to replace ur front o2 sensor in long wrong pretty common for that code.let me know what u find.
Mar 1, 2010 at 11:30 AM
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CLANCY52
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Thanks! I will try that tonight. I think you may be on to something though. When I started the car this morning the exhaust smelled like gasoline and I was thinking "it's running too rich"............
Mar 1, 2010 at 3:39 PM
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CLANCY52
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Tried it. didn't work.........
Mar 2, 2010 at 2:33 PM
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SATURNTECH9
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So did u replace the coolant temp sensor or just check it?I would also be checking ur fuel pressure.ur almost due for a fuel filter and they have a fuel pressure regulator built in them they get replaced every 100,000 miles I have the regulators in them go bad and cause the car to run bad.there expensive but I got the one for my 99 at autozone for 30.check ur fuel pressure and let me know what u find.
Mar 2, 2010 at 2:51 PM
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CLANCY52
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OK, I figured it out. I am officially a dummy. I reversed 4 and 1 onthe coil, work fine. Thanks for your help, IOU1..........
Mar 2, 2010 at 11:25 PM
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SATURNTECH9
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It's ok it happens to the best of us glad u figured it out.
Mar 3, 2010 at 12:11 AM