258 with Howell EFI Runs Poorly When Cold
dwyant30
Jeeper
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- Location
- Central Point, OR
- Vehicle(s)
- 86 CJ7 with 258ci NP435 Dana 300 Dana 30 Front Dana 44 Rear Howell TBI Sitting on 33s.
I installed the EFI kit on my CJ7 Jeep with a AMC 258 i6 / 4.2l I6. It starts ok in the cold, but then after about 3-5 minutes it acts like it starts to miss and then die. It will continue to do this until it reaches full temp and then it idles a little high. It also seems to be running a bit rich.
The fuel pressure in is 13PSI and 5PSI out. Not sure if that would cause a problem or not.
I have a DUI distributer that says timing can be at 12 initial timing but I'm not sure if that throws off the system in any way or not. I've tried running anywhere from 8 to 12 with no change.
My Webber carb acted similar to the fact that it would miss and made a popping noise in the exhaust system when it was cold. One of the reasons I upgraded in the first place.
Any thoughts as to where to start?
The fuel pressure in is 13PSI and 5PSI out. Not sure if that would cause a problem or not.
I have a DUI distributer that says timing can be at 12 initial timing but I'm not sure if that throws off the system in any way or not. I've tried running anywhere from 8 to 12 with no change.
My Webber carb acted similar to the fact that it would miss and made a popping noise in the exhaust system when it was cold. One of the reasons I upgraded in the first place.
Any thoughts as to where to start?