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258 stumble above 2500rpm


 
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dadstoys2
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Joined: 08 Nov 2005
Location: York, PA

PostPosted: Sat Oct 07, 2006 9:18 pm    Post subject: 258 stumble above 2500rpm Reply with quote

I have an 87 Wrangler with a 258I-6.
Problem I am having is that the rpms will pull strong up to about 2500rpm and begin to stumble and will not continue to gain rpm's. Sometimes while in Neutral the motor appears to increase but when it does the tach will fall to 1500rpm. I was checking the timming and noticed that the timming light will stop flashing reg above the stumble point which is telling me that its loosing spark above the 2500rpm range....my question is why?
Today I replaced plugs, wires, cap, rotor, coil, and distributor.....
Nothing has changed.
Does this have a control module anywhere? I am thinking I have a broken wire somewhere in the harness, causing a ground. Again....this thing has been stripped of most of the electronics and emissions(which I am not happy about, but it is beyond my budget to fix properly)
Also this appears to be an aftermartket Webber carb on it. And most of the emission things are gone....
thanks for any help.
~Rich
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dadstoys2
Member


Joined: 08 Nov 2005
Location: York, PA

PostPosted: Sun Oct 08, 2006 8:52 pm    Post subject: Reply with quote

Well that was it.....ignition mod.
$19.99 at the local parts store.
So I guess on the bright side....all the ignition parts are new Smile

~Rich
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