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General Forums => The Mess Hall => Topic started by: grumpygy on May 22, 2011, 07:44:29 PM
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OK I added in a 4.0 Throttle body with a Spacer(did not match them to the manifold will do that later) put in 19 Lb Injectors. Also a cold air intake(Actually just a tube that flows better). Put in a hotter coil and new Plug wire. Also a new set of plugs, Distributor cap and rotor. Cat is gone and has been gone, have a thrush Muffler I think. Kind of lound need to change that out.
Well it revs great not under load, under load above about 2500 RPM it just lays down.
Think I know the answer and its put in the 24 Lb inj or increase fuel pressure.
Sound about right.
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If ti's a TJ then you're really choking off the fuel.
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YJ with 31.5 and 4:11's
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24 lb injectors would be waaaay too much fuel
what p/n injectors did you get? new or used? tested or not?
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0 280 150 943, 0280150943
New.
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The air intake is made by Akimoto sold by Quadratec
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0 280 150 943, 0280150943
New.
yep, those are fine - 18.25 lb/hr at 43.5psi
check the fuel pressure, should be 39psi at idle with the vac line disconnected off the FPR .
did you swap the IAC from your t/b to the 4.0L one? (shouldn't matter though at 2500rpm)
what about the TPS (these are the same but just in case the one on the 4.0 has issues).
does it idle fine? what's the rpm at idle?
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Idle is fine and I swaped both from my 2.5 throttle body didn't want to take a chance.
I may want to run it this way for a little while, the jeep has not run in a few years and the fuel has been in it for a while. Get a few good tanks thru and see what happens.
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The air intake is made by Akimoto sold by Quadratec
Hey, my Jeep was used to prototype that intake :weee:
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Hey, my Jeep was used to prototype that intake :weee:
Funny they no longer sell it.
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Well took it out again 1st and 2nd gear is great almost cannot shift from 1st fast enough. Since It only had 1/2 a tank I went a head and filled it up. That may not have been a good Idea. A couple of miles down the road I picked up a Misfire. It comes and goes so think it may be the bad fuel(old fuel). Will pick up a can of seafoam on the way home tomorrow and see what that does.
Also when I thought it was not doing good forgot that the Speedometer is wrong. Used my GPS and it gets right up top 65 Mph quick. Never was much above that before and now its just the same.
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Well took it out again 1st and 2nd gear is great almost cannot shift from 1st fast enough. Since It only had 1/2 a tank I went a head and filled it up. That may not have been a good Idea. A couple of miles down the road I picked up a Misfire. It comes and goes so think it may be the bad fuel(old fuel). Will pick up a can of seafoam on the way home tomorrow and see what that does.
Also when I thought it was not doing good forgot that the Speedometer is wrong. Used my GPS and it gets right up top 65 Mph quick. Never was much above that before and now its just the same.
if you do the seafoam i strongly recommend you put the old injectors back in and go thru about 3 tanks before getting the new ones back there again. Replace the fuel filter before the last tank prior to re-installing the injectors again.
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if you do the seafoam i strongly recommend you put the old injectors back in and go thru about 3 tanks before getting the new ones back there again. Replace the fuel filter before the last tank prior to re-installing the injectors again.
Was thinking about doing that, man I really hate changing that fuel filter. Why can't it be easy like my truck.
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one thing to look for (it happened to a couple of guys on this forum) is that the injector connectors are making good contact, apparently it happens that they go in and out of commission and the engine ends up running in 3 cylinders - something to look at.
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Will do as that is sort of what it sounded like yesterday.
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Connectors were great. But did notice that At Idle the fumes had my eyes watering. So today was the 1st day I had enough time between rain showers to change the Injectors back to the stock ones.
That did it she is running great now. :clap:
Still have things to do like the fan Conversion when parts get here and to finish cleaning the inside. Hook the stereo back up.
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Well I just compared my Injector with the FAQ's on Injectors. It looks just like the Ford #24 truck Injector. It was supposed to be #19. Are there any markings on them I should look for.
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Well I just compared my Injector with the FAQ's on Injectors. It looks just like the Ford #24 truck Injector. It was supposed to be #19. Are there any markings on them I should look for.
the p/n you posted I found it listed as the "19#" which are 18.25lb/hr@43.5psi
you said they are new so unless the p/n is different not sure what to tell you. Are they yellow 4 nozzle bosch injectors?
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White 4 hole just like the 24 lb truck injectors. Except the metal part is black not silver/chrome.
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those are design II (4 hole disk design), not sure about the color - the white one in the FAQ is a pintle design (1 nozzle with needle) and that is different than what you are describing
you have the p/n stamped on the plastic portion of the injectors and is the one you posted?
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No Nothing on the plastic portion, and it for sure is 4 hole.
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Think when I get the fuel down a little father I will just drain it. She runs great for a while then all of a sudden starts to sputter and miss. Then back to running great. Also from time to time real hard to start other times starts just as it starts turning.
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Just to add a note. It was the new Coil I put on. Changed that and misfire went away.
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Just to add a note. It was the new Coil I put on. Changed that and misfire went away.
For some reason, I go through coils like a kid goes through candy... I guess the position of the coil does not help, as I plunge it into mud and water all the time. I am considering relocating it higher up on the firewall or something. Also, for some reason, the high end coils (Accel, PD Screaming Demon) tend to last less than the cheapo ones.