3.4 swap into 1985 Jeep Cherokee questions?

[Canyonero]

Can it simply be moved to another boss? I really don't know, but it looks like it would fit here:

[cardana24]

I believe you'll want the knock sensor. Even my TBI 2.8L with distributor has a knock sensor. How bad is the clearance issue?

I may need to try to bend the motor mount then. I don't think its going to go in the way it sits. Do you know if any other knock sensors have a narrower profile that accept the same plug?

[Canyonero]

I believe you'll want the knock sensor. Even my TBI 2.8L with distributor has a knock sensor. How bad is the clearance issue?

[cardana24]

What is the sensor that is just under the exahust manifold in this picture? You can see it has a little yellow tip.


The reason I ask is because when using the jeep motor mounts there is not room to put this sensor on the engine. Can I get around using this sensor? Would a previous year ecm not need this sensor to operate? Please let me know some info and information. I am thinking it is some sort of knock sensor, and I am afraid if I cannot plug it in the ecm will retard timing and run is safe mode all the time. Does another vehicle use this same sensor but with a narrower profile? Thanks for any help.

[cardana24]

I made a little bit of progress last night. I put in a fuel tank from a fuel injected Cherokee, and the pump and sending unit from an 88 4.0 cherokee. I replaced the rubber fuel lines going to the tank as well. I replaced the rubber fuel lines in the engine bay, and added an inline fuel filter before hooking the lines up to the stock camaro ridgid lines going to the fuel rail. After I did that I put the power steering pump from the 94 camaro on. I found out that the pressure line from this set up will work but it is in the way of the vac canister on my jeep. The non pressure line from the camaro set up is way too short to reach...so I used the lines from the jeep p/s pump. Since the non pressure line fitting was only held on by a clamp I ended up replacing this line with new 3/8's rubber hose. In the next few days I will get the ac side set up and hopefully start wiring this thing. Anyway I just wanted to document some of the parts and rigs that I had to do. Any comments are welcome. I'll post more pics soon.

[cardana24]

So I got the gas tank hung back under the jeep last night and replaced the rubber hoses going from the pump/sending unit to the hard lines on the jeep. I am using my stock fuel tank and a fuel pump and sending unit out of a 4.0 FI cherokee.

[Canyonero]

Yeah, that's what I got. Pretty sure I just got it off PartsAmerica.

http://www.partsamerica.com/ProductDetail.aspx?MfrCode=DOR&MfrPartNumber=34155&PartType=395&PTSet=A

[cardana24]

I used my Trooper steering pump, but those have a full serpentine setup to it all worked out to turn the same direction. I put a pulley in place of the Camaro A/C compressor, so I used the standard length too. I might try to get my A/C working this summer.

Did you get the AC delete bracket and pulley? If so where did you pick it up. I am thinking the AC is not on the top of my list right now.

[Canyonero]

I used my Trooper steering pump, but those have a full serpentine setup to it all worked out to turn the same direction. I put a pulley in place of the Camaro A/C compressor, so I used the standard length too. I might try to get my A/C working this summer.

[cardana24]

Make sure your water pump turns in the right direction. Did your doner engine have a serp belt? Are you putting the serp back on? The serp belt water pumps turn backwards from the earlier v belt serp 2.8's and early carbed v belt 2.8's. They don't exchange either I think. That's why when I built a 3.1 out of a 2.8, '87, I used the '87 oil pan, a different front cover that would work with the '87 pan and a water pump designed for a non serp engine. This went into an '86 S10 Blazer that used a serp and v belt. With the air pump off it was very hard to find a serp belt the right length.

I am planning on using all of the acessories from the 3.4 so I plan on running a serp belt. I have already put a water pump on the engine that is meant for a 3.4 camaro, so hopefully this will work out.

[Ray Hamilton]

Make sure your water pump turns in the right direction. Did your doner engine have a serp belt? Are you putting the serp back on? The serp belt water pumps turn backwards from the earlier v belt serp 2.8's and early carbed v belt 2.8's. They don't exchange either I think. That's why when I built a 3.1 out of a 2.8, '87, I used the '87 oil pan, a different front cover that would work with the '87 pan and a water pump designed for a non serp engine. This went into an '86 S10 Blazer that used a serp and v belt. With the air pump off it was very hard to find a serp belt the right length.

[geoffinbc]

He is? Oh yea. Never mind.

[Canyonero]

He won't need to time it, he's doing an SFI swap with DIS like mine.

[geoffinbc]

5/16 return is stock on EFI GM vehicles. I am a little late but a 2WD S-10 pan and S-10 manifolds would be the same as your Jeep stuff. If you get an 87+ pan it will match the Camaro front cover. Oh and just so you know the Camaro cover has no timing mark. So I guess you will be timing by ear unless you get an S-10 Front cover. Also newer S-10 manifolds only have 1 AIR fitting which can easily be blocked.

[cardana24]

Yeah, that's right, I think it's 3/8" feed and 1/4" return. Sounds like that's gonna work for you.

Cool I'll set that up soon.