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Unread 03-18-2013, 05:56 PM   #16
RockRollin
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1990 FSJ Wagoneer 
 
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Quote:
Originally Posted by CliffordsJeep View Post
I've read about how to test my coil, doesn't look like it is easy to troubleshoot. The engine is running pretty good now, I'm not sure I need to replace them.
Well, looks like someone beat ya to it. I'm not familiar with Jacobs controllers, have heard of it. Your already running a higher output coil........nevermind......

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Unread 03-18-2013, 07:52 PM   #17
CliffordsJeep
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I'm pretty frustrated. I managed to get copper washers from the local auto store for the 9/16 plugs for the AIR system delete, they go into the top of the exhaust headers.. I started the jeep up and it sounded pretty good under acceleration (a problem area before carb rebuild), but the idle is rough and pulsing slightly. After just a 30 -45 seconds of running the engine bay fills with exhaust. I could see exhaust fumes escaping about 6 inches below the 9/16 plugs, from under the engine on both sides of the block. I'm not sure why. I wasn't in a position to let the engine just run, or I could have traced it down better. I didn't think I had any issues with the header gasket, but apparently it is shot on both sides. Now I'm looking at options. Just replace the gasket, or gasket and new headers. I will try to pull the heads in the next couple days and inspect the block with them removed. New heads would allow me to get something that isn't ported for the air system. I do have the tubing and clamps for the cat delete. I am starting to get pretty off topic of the original thread, that problem has been solved. I may try to document my progress and start a new thread. Thanks for your input everyone.
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Unread 03-19-2013, 02:11 PM   #18
super98lsc
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Did you accidently remove one of the long manifold bolts that hold the manifold to the head and then plug it with a short bolt? You would lose clamping force to the head. I know the center bolt is a long one that passes through and holds the CAT air line as well as holds manifold to the head
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Unread 03-19-2013, 03:10 PM   #19
pleontks
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That looks like a quite nice ignition system you have there already.

I've got one rig with the stealth HEI, and one with the msd. The MSD is better, but the HEI was free.

If I were you, I'd leave the jacobs, make sure your dist cap and rotor is the large ford style, gap some champion plugs at 45, with some 8mm wires, and run it.


How long has your jeep sat? You could just be burning crap off the exhaust.
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Unread 03-19-2013, 04:03 PM   #20
CliffordsJeep
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Quote:
Originally Posted by pleontks
That looks like a quite nice ignition system you have there already.

I've got one rig with the stealth HEI, and one with the msd. The MSD is better, but the HEI was free.

If I were you, I'd leave the jacobs, make sure your dist cap and rotor is the large ford style, gap some champion plugs at 45, with some 8mm wires, and run it.

How long has your jeep sat? You could just be burning crap off the exhaust.
Yes, there was a lot of liquid wrench on the heads, lol. Close to a 1/3 of a can. I soaked those banjo bolts to the heads a full day before trying a wrench on them. Anyway, that burned off relatively quickly. I just put new plugs in at .35 gap, per the manual. Should I pull and reset the gap? I've been thinking about new wires, the ones on there show some signs of wear. I need to check the timing still, and will take a closer look at the cap at the same time. Oh, and I don't know how long the Jeep has sat. I'm the third owner. The second owner put over a 100k on it and had it serviced regularly at the dealer in CA, but it appears to have sat for some time at the dealership I purchased it from.
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Unread 03-19-2013, 04:03 PM   #21
CliffordsJeep
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I rolled the Jeep out of the garage this morning. I had my wife start the engine while I watched for fumes. As the temp came up, what I initially thought was exhaust turned out to be oil. The valve covers were seeping and 'steam' was coming up from what small amounts of fluid actually made it to the heads. I cut the engine and reviewed my vacuum lines. I had a couple of crossed and the egr had come disconnected somehow. This relieved pressure in the heads, no more issues! It seems to be running great now. Thanks to everyone for your input.
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Unread 03-19-2013, 07:05 PM   #22
super98lsc
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Nice work. And as others mentioned if you have a Jacobs box and upgraded coil you should be in great shape already. if wires are old change them and the system should fire an .045 gap easily.
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06-Corvette z51-6spd,b&b,K&N low miles.
77-Corvette Stingray 496 BBC/TH400 built 667hp+
===================================
00 WJ 4x4, 4.7 stroker, turbocharged,..lots more..
01 WJ 4x2 4.7v8 Limited (needs valve job)
90 Grand Wagoneer 401 Edelbrock Heads, Lunati .510/.527 FT Cam, Edelbrock RPM Air Gap, Holley HP 750, Thorley Headers, HEI, Electric Fan w Digital controller,4" lift 31x10.50 Goodyear Duratrac's on Pro-Comp Wheels,new interior, seats,seals,Alpine and JL full system, Remote HEI, Clifford 2 way with remote start,windows,tailgate.
96 Cherokee Country 4dr/2x2 White/Tan 3" Lift Sahara 18" Wheels 32.5"'s 99up head and intake- for sale soon!
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Unread 12-30-2013, 01:58 PM   #23
malcoll
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So the 1/2 inch cut-down 9/16 bolts were OK?
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