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Unread 08-01-2008, 06:40 PM   #136
Last Boyscout
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Caution using WJ filter/regulator

I went out of my way to find a fuel pump that was a stand alone external. I ended up with the Summit SUM-G3138 ($79.99.) Itís an 85psi max that flows 43gph. When I put my gauge on it Iím getting 90psi. Then I went with a WJ filter/regulator ($29.99) to cut my fuel pressure to stock specs. After running for less than 30 min the filter was only putting 10 psi at the rail. I just figured I got sloppy and didnít clear one of my lines and clogged the filter. So, I replaced it with another WJ (first mistake $29.99.) After installing and checking pressure at the fuel rail witch I was unable to due before the first one died. I realized I had a problem. 60psi at the fuel rail. I had too much pump for the WJ filter/regulator.

Now knowing it was only a matter of time before this one was gutted I started shopping for a pressure regulator. When I say shopping I mean being cheap witch is the reason I went with the WJ filter in the first place. So, $45 later one was on the way from Hong Kong off of eBay. When it gets here I find there is no fuel return. We tried to plumb it in before the WJ filter at 60psi and let the 2 of them bring it down to 40psi. We never got it to 60 at the China piece of junk before the WJ filter (#2) died.

So, we tried to tune the new shinny Hong Kong crap and see if the duty cycle of my Summit pump was high enough (100%) that it didnít need a return. Well itís not.

For those that are keeping score I am at or even past the cost of a Mallory regulator all in the name of being cheap. So, once again the call goes out to Summit for a Mallory regulator MAA-4305M ($99.95.) The moral of the story, being cheap will cost you more in the long run.

If you chose to use the WJ filter/regulator make sure your pump is not pushing to far over stock pump psi.

For what itís worth she ran great for the hour or less she was running. I just donít know if that hour was worth $100.

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Unread 08-01-2008, 09:43 PM   #137
supraman1990
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You used OBD2 stuff? Poor man. I've got the stock OBD1 regulator holding back my 115 PSI rated Walbro, and it's doing a fine job.
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Unread 08-02-2008, 09:54 AM   #138
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supra, don't throw me a pity party just yet. since you're selling your jeep you won't know if and when the stock regulator fails. chances are it won't fail. but how old is that stock non rebuild able pressure regulator.

i'm just screwing with you.
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Unread 08-02-2008, 01:07 PM   #139
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It's the OE one as far as I know. It is replaceable, they cost around $30. I'm attempting to sell it, but I'm not going to put something on someone else if I don't believe in it.
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Unread 08-02-2008, 01:25 PM   #140
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dude supra, i was just giving you s***. i was not honestly trying to suggest you were or would sell a lemon jeep.
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Unread 08-02-2008, 05:56 PM   #141
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Sorry, can't tell too much sarcasm over the keyboard. However, the OE regulators are VERY strong.
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Unread 08-11-2008, 03:43 PM   #142
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It never ends! So, I did get the Mallory listed above. Great craftsmanship! Studding it to come up with the AN-8 fittings I realized something I over looked on the Hong Kong regulator. I realized the regulators worked like a needle valve and just let a adjusted amount bleed off. Then it hit me that the H.K. regulator did have a return. It was lost in translation on the diagram. they had it labeled "out." The gauge was mounted in the out to the fuel rail, and the lack of a extra hose barb in the package added in me over looking this. So, a trip to the store, rerouting, and some adjustment and she was ready to go. Now with the gauge off the regulator I'm going to mount it permanently to the fuel rail. Summit being the great suppler they are will give me a refund on the Mallory. I lose shipping but that's cheap compared to the other money I've lost on this issue.
If anyone wants to Mallory speak up before the end of the week and I send it back to Summit. $100 and it's your. I was already going to eat the shipping sending it back.
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Unread 08-11-2008, 03:53 PM   #143
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what i wanna do it go from a '97 2.5 to a carb 6
is it gonna pass inspection?


anyone here did that?
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Unread 08-11-2008, 04:17 PM   #144
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carb? what block? 4.2 or 4.0? a carbed motor swap is easy. just get all the smog/pollution components for that motor. ERG valve etc.....

this is the 4.0 MPI swap thread. your question would be better suited for the CJ forum if it's an AMC I6 you want to swap.
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Unread 08-21-2008, 06:43 AM   #145
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I have a few options to replace my weak 258. I have a 360 and I have a '93 Wrangler 4.0. I can get the harness and computer from a wrecked Cherokee(early'90's). So I guess I'd have to send out my bellhousing to have the CPS mod done and find someplace to buy the VSS for a '91 Wrangler. Anyone found someplace other than Hesco to buy the VSS? My CJ5 currently has a T176/Dana 300 in it and I have a T18/Dana 20 out of a '78 or '79 CJ7.
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Unread 08-21-2008, 07:19 AM   #146
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Part #56027015 VSS
Dakota 4cyl & 6cyl 88-93
Dakota 8cyl 91-93
Dodge 6cyl D100, 150,250 88-89
Dodge 8cyl D100 Ram, D150, 250 88-89

don't waste your money on the Hesco VSS just get one from a salvage yard for $5 to $10. most yards will tell you they don't have any because they pull the tranny. get them to let you look. i've found 2 just by looking. if it's there it'll still be hanging from the speedo cable. don't forget to check for the 2 wire connector on the harness. and don't over tighten when you install it. i cracked the aluminum nut on the first one i got. i didn't try to epoxy it. i just went and got another. they are that easy to find.


here's a good link on the CPS bellhouseing mod. i chickened out and paid $280 for the AA harmonic balancer CPS adapter. in hind sight i wish i'd just gone for it to save some $.
http://www.cjoffroad.com/forums/topi...TOPIC_ID=17156
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Unread 08-21-2008, 07:21 AM   #147
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Quote:
Originally Posted by Kman1983 View Post
I have a few options to replace my weak 258. I have a 360 and I have a '93 Wrangler 4.0. I can get the harness and computer from a wrecked Cherokee(early'90's). So I guess I'd have to send out my bellhousing to have the CPS mod done and find someplace to buy the VSS for a '91 Wrangler. Anyone found someplace other than Hesco to buy the VSS? My CJ5 currently has a T176/Dana 300 in it and I have a T18/Dana 20 out of a '78 or '79 CJ7.

I believe a VSS from an early something Dodge Dakota is supposed to work. I crawled under one and it looks like it might work. The speedo drive looks to be a different size but I think it could be adapted. I'll try to run without one first and see how that works.
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Unread 08-21-2008, 07:28 AM   #148
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i forgot you will need a thread adapter to use the mechanical part of the VSS. you can get one from a performance shop or take it off the cruise control of an early 90's xj. it's on the cruise unit under the dash.
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Unread 08-23-2008, 07:43 PM   #149
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Thanks Guys!! This info has been great. I think I'll try to modify my own bellhousing.
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Unread 08-24-2008, 01:45 PM   #150
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Hey guys I have a question. My dad and I have a really nice old CJ but the engine is not holding oil pressure so we would like to do something. Recently we realized just how cheap we can get Grand Cherokee's and we were looking into an motor swap. The thing we want to know is can we use the automatic transmission from the Grand Cherokee in a swap while still using the Dana 300 transfer case? I guess the better way to put it is does it bolt up? If not does anyone make an adapter or would it be easy to have one made? Any other options? We will be at the auction on Tuesday and Thursday and we will be keeping our eyes open for rusted out GC's to do the swap w/ and hopefully help out our own GC's interior a bit lol.
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