I installed a 350 tbi and 4l60e into my fj60 and Have just about finished the install I just need my drive shaft monday and a power steering line but I cannot get it to run. I bought a running engine with 109k the 4l60e is rebuilt and I had a custom harness made for the engine and transmission combo. The engine will start but will not run for more than a couple of seconds. I used a brand new walbro inline fuel pump from aztpi in tempe with the new fuel line coming straight from the tank. the oil pressure switch is brand new the iac is brand new as well as teh coolant temperature sensor. Plug wires are new distributor cap is new. If you load it up with fuel it will run for a longer time but still will not keep running. If I pump the peddle I can barely keep it going for a while. It eally seems like it isn't getting gas but I can't figure out why. I'm at a loss I have tried quite a few different things and just don't know enough about the TBI to get it figured out. Its timed as close as I can get it without it actually running. The computer is the original comuter with the engine. Any Ideas? If someone knew alot about these and could get it running I'd be willing to pay as well I just can't get it figured out. Thanks in advance for anyhelp.
Anyone know alot about a 350 TBI engine?
- Thread starter Kurtis
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I don't know alot about the 350 TBI but it does sound like fuel from everything you say. Does the fuel pickup in the tank have a filter on it or screen? Where is the filter inline? How much fuel in the tank ? Did you spec out the fuel line and pump for your for the motor your running? Just curious if you are getting initial pressure then when the demand is there, it drops do to line size screen etc. I am assuming TBI is throttle body injection Correct?
I would imagine that type of system has a spec for the fuel pressure
Howdy! I spent a lot of time helping my son with this same setup in an 89 Burb and a 91 Camero. Verify that the fuel pressure is adaquate at the throttle body. Just T in a gauge and check it before, during, and after start. Have you tried putting a rebuild kit into the injectors? It is pretty cheap, and easy, and the screens on the bottom of the eggs can get nasty if they are sitting a lot time without running. Just be Very Careful with the ittsy bittsy O rings in the injector kit. Check the clips on top of the injectors to make sure they make a good connection. I have seen them dry rot and crack from the heat, so they just sit there, but they don't really SNAP ON. Could be a dead throttle position sensor. I think there is a test for that with a meter. Have you got all of the vacuum lines hooked up or blocked? Have you got the wires and vacuum line hooked up to the Air Pressure Sensor?? Name might be wrong, but works the same way. On the Burb, it was a flat box about the size of a pack of smokes, under the air cleaner, next to the IAC. On the Camero, it was on the firewall. Oh, yea, on the fuel supply, did you hook up the fuel return line back to the tank? The throttle body has an internal regulator that bypasses excess fuel back to the tank. Ox sensor should not come into play when the engine is cold, but make sure the little wire is OK. We had one that was grounded out on the exhaust. Oh, and one more idea: make sure you have a fuel filter rated for fuel injection. Otherwise the guts fall apart from the higher pressure and it blocks the fuel outlet. HTH John
- Thread starter
- #4
The fuel pump I got from aztpi and it makes almost 40 psi they told me so it should be more than adequate for the TBI. when I pull off the line and pump into a buket it really flows. The return line I can tell is pumping gas back as well. Maybe I do have something in the tank. I filled it up with gas before teh swap so i should be good there. I guess I'll take a look at the injectors maybe something got in there that is clogging them up. Inkpot are you a mechanic by trade? You seem pretty knowledgable on these things. The thing that gets me is that the engine ran before so I wouldn't think the throttle position sensor would be dead but something has to be wrong so I'll see if I can figure out how to test it.
Where you located?
Howdy! My son lives at Elliott and Recker, too bad he traded the Burb and the Camero for a Diesel Dodge. Anyway, I'm guessing your testing the fuel flow downstream from the filter, so that should be good. I think the TBI needs like 27-29 psi minimum. If the engine was running OK just recently, then I would bet on either a loose wire, loose/cracked vacuum line, or wiring mistake by the folks that make the harness for you. Check to see if they used Chevy factory wiring colors on the Chevy side of everything. It is real easy for them to swap leads on a two or three wire plug. If you can rig a fuel pressure gauge right before the TBI, then you can see if it is holding pressure after it starts. If it completely drops to zero, then the pump is being switched off by the computer, such as low oil pressure safety cutoff. Or, do you have the fuel pump wired into the start circuit, instead of the ignition circuit? If the pressure just drops below 25, then it is some kind of restriction. Do you have an electric radiator fan wired into the coil lead? Just trying to brainstorm a little. If it is not obvious, then it is some little sneaky sucker that might not make much sense. I'll talk to my son tomorrow to see if he has any suggestions. It was nearly 3 years ago when we had to troubleshoot his cars. John
P.S. No, I'm not an auto mechanic by trade, but I have been practicing for many years.
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- #8
I cleaned up the injectors with some carb cleaner and it now runs. I was a happy man its always the simple things I guess. It still will only idle on its own for about 10-15 seconds but if I hold the RPMs up just slightly or give it a little gas every once and a while its runs great. I'm going to take them in and have aztpi clean them for me and see if it takes care of it the rest of the way. Its running smooth as well like it should so Hopefully in the next day or two I'll take it for a spin. Thanks everyone for the suggestions.
I had one other question. Where do you guys get the power steering lines made to go from toyota to chevy? Does someone sell an adaptor fitting or is there a shop locally that can make one or sells them premade?
One other question I have to finalize my crossmember is there anyone locally that sells the transmission mounts? I have the TBI to 4l60e with the advanced adaptors adaptor so it just takes the stock mounts but if anyone has anyother suggestions i'm open to anything.
I had one other question. Where do you guys get the power steering lines made to go from toyota to chevy? Does someone sell an adaptor fitting or is there a shop locally that can make one or sells them premade?
One other question I have to finalize my crossmember is there anyone locally that sells the transmission mounts? I have the TBI to 4l60e with the advanced adaptors adaptor so it just takes the stock mounts but if anyone has anyother suggestions i'm open to anything.
Howdy! There is an IAC adjust/reset proceedure. Did you do this when you replaced it? Is it idleing too slow? Some TBI bodies have an idle adjustment screw in them. Glad to hear it is running better. John
Howdy! I just used the original hoses. I very gently bent the hard line sections to clear the radiator. My setup was very close to the Chevy arrangement. I put the steering box behind the radiator support, so I did not need longer hoses. John
Howdy! Ifn ya got time, drop by the meeting Friday. I will be there with the Piggy. You can take a personal look at the most unique power steering arangement I have ever seen. It's finally on the road again. Damn, does it feel good. It's been 7 months. So far I have just been puttin around the neighborhood, but I plan on getting out on the freeway this weekend to make sure it is road worthy. Don't want to suprises on the way to the woods. John
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- #13
I wish I could have made it and checked out your setup, my wife really likes the 55s and 40s. I've isolated all of my problems to the fuel pump. Something is not getting pressure or regulating the pressure correctly. If I pinch the return line it will keep going and run smooth and eventually it will build some pressure and i'll let it blow a little by. Could my regulator spring be bad? If I don't pinch the line the injectors won't get enough pressure. Maybe it is just a week pump as well. Some how though its not building pressure like it should. If I can get this figured out everything else is ready minus a/c.
Howdy! It could be that the original donor had some kind of restriction down stream on the return line. Or it may be the regulator in the TBI is bad. Maybe a restriction before the pump, so your not gettng up to full pressure on the supply side. Is the filter between the tank and the pump? If so, it could of picked up a lot of trash from the tank, especially since the OEM Toy stuff was only pulling less than 10 gpm. Check for kinks in the hard lines, and collapsing soft linesAll of the soft lines should be new "fuel injection" rated fuel line. Keep lookin, it's in there somewhere!! I'm going to be doing some test drives over the next week or two. Maybe I can drop by sometime. John
That pump is too hot for a TBI. I run a 17psi blue pump on my truck without any problems. The stock TBI should run between 15 and 20 psi. I have the GM TBI book at the house somewhere with all of the system specs in it. I'll dig it up and post the findings. It sounds like you might need to choke it down before the injectors. Lemme pull up the specs for ya.
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- #16
Where did you get your pump? The guys at aztpi keep telling me that the stock regulator in the tbi should be fine for that pump? I was thinking the same thing as it runs fine as long as you pinch the return line. which if it isn't getting enough pressure to the injectors defiantly shouldn't be going out the return.
- Thread starter
- #17
Runs like a champ I feel like a moron as I had the fuel lines switched. I took apart the tbi unit and looked and it and for the life of me couldn't figure out how a regulator at the begining of the inlet would keep feel pressure up. I then put two and two together and it started right up. I cleaned up some things today and took it for a spin. It didnt shift out of first but I realized I didn't have the vss hooked into the housing so that should explain that. At the moment it just has two straight pipes out of the manifolds and it sounds mean, I wish I could leave it like that. I need to get to a meet so I can join the club and go on some runs with you guys. Thanks a ton for the help everone. I really want to see that 55 and Bmans 40 it looks pretty sweet in the pictures. My wife wants a 40 to drive in the winter but I have to recoup from this project and Obamas porkulus package draining the economy before I do any more projects.
One last question, how do you guys insure these things after you dump a little cash into them?
One last question, how do you guys insure these things after you dump a little cash into them?
Howdy! Well CONGRATS!! on getting it going. I know how easy it is to overlook them little details. I had good results with Mesa Muffler, close to downtown Mesa, on my rig. They tacked onto my exhaust stubs and ran it out exactly where I wanted it. It is up tight, and out of sight. Never hit it yet. But that's only been about 17 years. Still hangs and sounds good. TAlk to your local agent and see what they can do for you. I have a friendly agent, he went to school with my kids, and then took over the business from his dad. I've had 1 house and a bzillion cars insured thru them, and pretty good results overall. Most will go whatever comp and collision levels you want. I recently went with Histerical plates so I don't ever have to smog it again. There are some driving limitations, but if it is not your DD, then it is no biggie. I have yet to hear of anyone getting a ticket for driving one too much. John