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Old 07-15-2018, 05:13 PM
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Tbeach Tbeach is offline
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Join Date: Nov 16, 2014
Location: Southern California
Posts: 14
Howell EFI & Engine rebuild & correct cam

I have a 1991 Grand Wagoneer in California with 112,000 miles. Recently had the engine rebuilt, with some mild upgrades. Also upgraded to Howell EFI. The chosen cam is a Comp Cam XE 262H. Duration at .050" intake 218 exhaust 224.

Everything is together, idle is smooth, but there is a low end hesitation and it stalls every once in awhile. We have checked grounds, the alternator has been upgraded, and check all vacuum connections. With many hours researching this forum, I have come to the conclusion that the camshaft is the issue, specifically the duration of the cam. Howell recommends below 210 and 220, and I have also read on this forum to stay below 208 and 215.

So short of removing the cam and installing a new cam with the lower duration, are there any other workarounds?

Thanks in advance for your input.
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91 GW, rebuilt and mild upgrade AMC 360, Howell EFI, 4" lift, HEI, 31" BFG AT KO2.
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