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Unread 06-16-2013, 02:21 PM   #1
quarterback4
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Join Date: Jun 2013
Location: Del City, oklahoma
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93 surges when driving

I have a 93 wrangler straight 6 that surges when driving, I have replace the fuel filter. and the injectors, and plugs and new wires and rotor, still having problem. Any help?

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Unread 06-16-2013, 06:32 PM   #2
superj
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1987 YJ Wrangler 
 
Join Date: Mar 2008
Location: corpus christi, texas
Posts: 6,412
Ecu temp sensor is good? Is there a map sensor on the fuel injected models? I don't remember from when my wife had a 93. The fuel pressure is holding good?
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Unread 06-17-2013, 06:21 AM   #3
UZI4U
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1993 YJ Wrangler 
 
Join Date: Aug 2011
Location: Black Hills, Daschle & Herseth-free SD
Posts: 501
Pull off the throttle body and use a can of carb cleaner on it. Make sure to use a new gasket when you put it back on. If it persists, you might try a throttle position sensor.
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Unread 06-17-2013, 08:58 AM   #4
92BlackandBlue
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1992 YJ Wrangler 
 
Join Date: Mar 2003
Location: Monument, CO
Posts: 33
Mine was doing this exact same thing, ended up being the throttle position sensor. One of the most annoying things to deal with.
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Unread 06-17-2013, 02:30 PM   #5
idaholtby
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1991 YJ Wrangler 
 
Join Date: Apr 2008
Location: Meridian, Idaho
Posts: 2,554
Please check for codes, while not all problems on OBDI can be picked up, it is the first place to start. Beyond that, if no codes, then check fuel pressure at the rail using the Schrader valve. Rent a tester from a part house if need be. Check pressure at idle and again with the vacuum line removed from the fuel pressure regulator. Reinstall the vacuum line and then shut her down. Continue to monitor the pressure over time and see how much it bleeds down if at all. This info will give us a good point to start with to help you solve this issue. This may not show any good info, but at least many things will be ruled out.
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Unread 06-17-2013, 04:22 PM   #6
quarterback4
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Location: Del City, oklahoma
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Thanks I will try these, no code comes up.
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