Is mt timing the problem? - JeepForum.com
 
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post #1 of 5 Old 03-13-2007, 08:00 AM Thread Starter
ElvisV04290
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Is mt timing the problem?

OK, so I installed my Weber like many of you know a few weeks ago, and I have been having a small problem. I have some hesitation on moderate to hard acceleration, and I'm thinking its the timing. I have replaced ALL the vacuum lines and have made sure they are connected correctly. The entire ignition system is new and double checked for loose connections. Plugs are 4 months old and clean. fuel pressure is 3psi (what Weber says it should be) and the fuel lines are clear and unkinked. I have a new fuel filter. The accelerator pump is working fine. Sometimes the engine has no problem when I put my foot to the floor, and other times I get a pop and a long hesitation, then the motor picks up very fast. I was thinking this is because the computer is no longer hooked up to the electronic feedback from the Carter; And because of this the computer is changing the timing on me cause it doesn't know whats going on. I know a nutter bypass would fix the computer problem but I want to be sure it my timing causing the problem, regardless if the computer is changing it or not. thanks guys.


1990 YJ, Colorado Red with 'Laredo' markings, 4.2L, TF999, NP231, Valvoline Syn fluids, Weber 32/36, Nutter Bypass, Dana 30/35, 16" Electric Fan, Optima Yellow Top, 140amp alt., K&N Air Filter, Cherry Bomb muffler, SRC Front Bumper, CH&F Shackles, KC 100w Daylighters, Homemade Lightbar, Rear Aux lights, Cobra CB/PA/WX, 102" Whip Ant., 400 watt power inverter, 2 fire extinguishers, Mobile Internet & WiFi equipped.
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Weber 32/36 Install -> http://www.jeepforum.com/forum/f12/weber-32-36-install-write-up-382309/
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post #2 of 5 Old 03-13-2007, 08:04 AM
lah2420
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I speak from experience------Do the bypass. The computer is screwing with your timing.
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post #3 of 5 Old 03-13-2007, 08:12 AM Thread Starter
ElvisV04290
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That's what I was thinking, I was going to do it no matter what, I just need to get a timing light. It will hit 70 here in Chicago, maybe I'll get to it today.

1990 YJ, Colorado Red with 'Laredo' markings, 4.2L, TF999, NP231, Valvoline Syn fluids, Weber 32/36, Nutter Bypass, Dana 30/35, 16" Electric Fan, Optima Yellow Top, 140amp alt., K&N Air Filter, Cherry Bomb muffler, SRC Front Bumper, CH&F Shackles, KC 100w Daylighters, Homemade Lightbar, Rear Aux lights, Cobra CB/PA/WX, 102" Whip Ant., 400 watt power inverter, 2 fire extinguishers, Mobile Internet & WiFi equipped.
Daily Driver since April 23rd, 2003

Northern Illinois Extreme Jeep Club Member www.extremejeepclub.com
Weber 32/36 Install -> http://www.jeepforum.com/forum/showthread.php?t=382309
Early YJ Club Member #37
For anyone with a 4.2L --> http://groups.jeepforum.com/258s_Unite
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post #4 of 5 Old 03-13-2007, 11:53 AM
lah2420
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You're as warm there today as it is in the South where I am. Enjoy while you can.
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post #5 of 5 Old 03-13-2007, 09:54 PM
timatoe
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Do the bypass and the just unplug the computer until you can get all the wires pulled. Get a timing light, I got one from Autozone for $39 it's a pretty good unit. I definately agree the ECU is screwing with you.
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