I am in the process of putting a 350TBI into my 1973 FJ40. The donor vehicle was a 1992 Suburban with an automatic tranny. The tranny I plan to put in is a SM465. A mechanic buddy of mine said that I might have some problems since I am not using the original tranny to the CPU. He said that I might need to chip it in order to get the CPU to work correctly. I didn't need to hear this as money is tight enough as is!! Any words of wisdom would be greatly appreciated!!
Possible 350TBI Conversion Problems
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Chip it...NEVER
It depends on what harness you are using? If you are using the stock one from the truck. I have never had a problem and we have put 4 Complete 4.3L with TBI's into our HEEPS. I never did anything but ground out the neutral safety switch when we ran across it. I can send you all sorts of TBI info.. Just PM me ....
It depends on what harness you are using? If you are using the stock one from the truck. I have never had a problem and we have put 4 Complete 4.3L with TBI's into our HEEPS. I never did anything but ground out the neutral safety switch when we ran across it. I can send you all sorts of TBI info.. Just PM me ....
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I'm rewiring the whole thing!! I have decided on Painless for the body, but I am still undecided about the TBI harness. So, are you saying a good wiring harness will take care of any issues I might have between the tranny and the CPU?? I've heard good things about Howell, but then again I am on a budget!!
Yes, you can do a TBI harness with or without Speed Sensor.. And i care less if others say you cannot.. Been there doing it.. look at the Black HEEP on my website... Also Howell is/are/always will be the TBI experts.. I do recommend the cal-pack and u can find manual chips used for cheap
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There are a couple of folks that sell a stand alone harness for 250.00 I used one on a tight budget build and three years no issues.
Downey
SILVER Star
My guess is that Copper204 does not know ALL the things a VSS does, and does not know how well his rig would run if he had a VSS (yes, they get by without a VSS, but that's about all). You should talk to Stealth Conversions about a metric 2 pulse VSS that goes into your speedometer drive. The problem with the Howell harness is that he wires them for NOT using a VSS, then once you realize your rig actually would run alot better with a VSS, your stuck.
Not to be persnickity.. But you are incorrect about Howell. He Wires all of them with VSS. he is the one who lectures folks about not running a VSS? Look again at his kits and you will see.
Like I said in Post
Like i said in prior post. there are those who differ in opinion. But I have installed over 15 Howell Jinjection TBI system. And each one came with a speed sensor. And as i stated. some believe you need one and some believe you dont. I use them, but have had a couple who were convinced not to use them, since they are rock buggies. But to make an unsubstantiated statement is incorrect. the following is a picture of just one HEEP in my driveway of 5 sitting out there with either a TBI or in a couple cases EFI. None of them came stock this way. But I will sit back shut up and let others direct you that are apparently more knowledgable.
QUOTE directly from Howell website in regards to the Harness I was trying to refer you too:
""Part # H243
Engine wiring harness for adapting production GM V-8 and 4.3L V-6 engines into pre-computer vehicles. Two styles available for both 454 and small block V8/V6 applications, 36" length from engine to ECM connectors. Includes emmission connectors to match pickup truck and van engines from 1987 to 1995. REQUIRES vehicle speed sensor and park/neutral switch (or manual transmission PROM) to be 50 state legal. Utilizes pickup truck ECMs 1987-1995 for proper function. "
Picture of one of mine-
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Like i said in prior post. there are those who differ in opinion. But I have installed over 15 Howell Jinjection TBI system. And each one came with a speed sensor. And as i stated. some believe you need one and some believe you dont. I use them, but have had a couple who were convinced not to use them, since they are rock buggies. But to make an unsubstantiated statement is incorrect. the following is a picture of just one HEEP in my driveway of 5 sitting out there with either a TBI or in a couple cases EFI. None of them came stock this way. But I will sit back shut up and let others direct you that are apparently more knowledgable.
QUOTE directly from Howell website in regards to the Harness I was trying to refer you too:
""Part # H243
Engine wiring harness for adapting production GM V-8 and 4.3L V-6 engines into pre-computer vehicles. Two styles available for both 454 and small block V8/V6 applications, 36" length from engine to ECM connectors. Includes emmission connectors to match pickup truck and van engines from 1987 to 1995. REQUIRES vehicle speed sensor and park/neutral switch (or manual transmission PROM) to be 50 state legal. Utilizes pickup truck ECMs 1987-1995 for proper function. "
Picture of one of mine-
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Downey
SILVER Star
No argument from me, I'm glad Howell finally got onboard!!!!!
