Perhaps some of you technically savvy folks can help solve a big problem. Ever since I had my tranny and torque converter rebuilt, and the TransGo valve body installed, my truck will not execute the 1-2 shift at the programmed rpm. The chip is programmed to make this shift at 5500 rpm, but under full throttle accelleration the motor just revs to 6000 rpm where it hits the rev limiter and activates the dreaded boost cut off. I have made three trips to Torrance, and Swanson has re-burned the chip at least 15 times, adjusting all kinds of parameters- line pressure, slip times, shift rpm, etc., but nothing seems to make the truck shift at the correct rpm. He also tried a program that Sal sent him, but that didn't work, either. Its extremely frustrating driving a beast that you can't leg because the boost shuts off. Danny seems to think it may have something to do with the new valve body. I wonder whether it may have something to do with the higher stall speed of the new tq, but then I don't know beans about it. I am seriously considering trying a Diablo chip, but that will not work with my ProM, so I would have to do a new intake as well. So I would be out a whole lot of bucks with no assurances that the new chip would fix the problem.
I notice in another thread https://www.f150online.com/f150board...ML/013495.html that HyE_Bolt seems to be having a similar problem. I could disconnect the boost solenoid as suggested in that post, but I doubt that it would be very good for the motor to keep slamming up against the rev limiter. So, do any of you gear heads have any idea why my truck won't shift right, and what I can do to fix it?
Sign me,
Desperate in Ventura




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I'd rather have a bottle in front of me than a frontal lobotomy.

'84 Alan Record Carbonio, Aerospoke wheels, Campy brakes.

'00 SVT Lightning, silver, built 2/9/00, #133 of 4966, G-tech Pro, JBA headers, 4.10 gears, Swanson chip, Pro-M, NGK plugs, carbon drive shaft, Roadmaster suspension kit, TransGo shift kit, cam bolts, Jackson washers, Wet Okoles, Kenyon transmission
13.39 @ 102.5

2001 Kevlacat 2400, twin 115 Evinrude FICHT, Raytheon VHF, radar, autopilot and GPS chartplotter/fishfinder.



gmvye@pacbell.net

 

Does it shift correctly without a chip?

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99 Lightning- JL equipped! JL Ram Air, JL Daiblo Chip,90mm MAF,JL Power Cooler, Level 10 shift kit,PSP Lower pulley, Single Blade T/B, Bassani exhaust, NGK's. 12.42 at 109.6..Full trim and stock convertor, MT Street ET's.
New times w/ JL converter coming soon!

 

Well, i saw my name mentioned above concerning the boost shutting off, and the feeling of the boost being lost on the shift. Just to let you know, i don't have a chip and the truck is bone stock. I was thinking it was just something wrong that i was going to need to take in to the dealer to have it checked out or fixed. Just thought i'd let you know.

 

i had the same problem...heres your answer..Call JDM,talk to Jim , tell him the problem.He burned me a chip two days prior to WFC4 I managed to get third place!!!!
Jim knows chips,all the guys are good!bBut Jim Saved my A$$.
J MAN
If you need a phone number drop me a line hamptonharley@yahoo.com

 

Unplug the boost regulator. thats what I did, my truck shifts at 6000rpms on the tac (which isn't that accurate). I used to have that same problem and now its fine.

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POWER SURGE PERFORMANCE RULES!!!

 

I will try it without a chip. I think I already did, and still had the problem, but I will check it again. I guess I wasn't all that interested in those results, because with my 4.10 gears I can't run my truck w/o a chip.
But here's a real anomaly that may provide a clue to the puzzle- I tried launching the truck at one of my favorite test spots today, and I had a lot of initial wheelspin, so I lifted for a second and then got back on it, and voila, it made the 1-2 shift at exactly 5500. I thought the problem was gone. NOT. I tried another launch later, with just a little bit of wheelspin at the start, but not enough to lift, and the truck hit the rev limiter again. So it appears that this glitch has something to do with wheelspin- no wheelspin, shifts as programmed, otherwise, no. And here's another oddity. I tried launching in 2nd gear. It surprised the s**t out of me when it downshifted to 1st, I got sideways and damn near lost it, my only other Ford with an auto would stay in 2nd no matter what if the lever was in 2nd, so I wasn't expecting a downshift, but then, another surprise, when it upshifted to 2nd again it did so at 5500, not 6000. I can replicate this every time- start in 2nd, tromp on it, it downshifts to 1st and then shifts back to 2nd at the rpm programmed into the chip. I wonder if this also has something to do with the reduced wheelspin when downshifting while already rolling, although I'm pretty sure I got a little loose, in more ways than one, on some of these tests. But will talk to Jim and see what he has to say.

Oh, and if any of the chip makers want to contact me directly, so that you are not accused of commercialism on the board, feel free to do so, the link to my e-mail is in my sig. But if all you are going to do is tell me that your chip makes all kinds of power and is the greatest thing since sliced bread, don't waste your time, I know that all the reputable chips out there do this. What I want to hear is a plausible theory about why I have this shifting problem, because if you don't know what's causing it, I don't see how you can fix it, and all the power in the world won't do me any good if the boost keeps shutting off.

[This message has been edited by alphadoggy (edited 06-14-2001).]

 

How many miles do you have on your truck? We had this problem when our fuel filter (whole fuel system as well) got cloged. The motor was starving for fuel and the computer would not shift it. Change the filter, flush the system, problem fixed and running great.

 

Alpha,
DO CALL JIM but also check your speed sensor in the rear end. Mine got dirty or whatever and started giving me erractic shifts till I changed it.($9.95) Ford knows these sensors are JUNK and my dealer has replaced a ton of them since 97'on the F150s. They even carry 30 in stock.
Its located on top of the rear axle pumpkin with a bolt holding it in and an electrical plug connected to it. It's held in by a 3/8" bolt?
It must be magnetic because of all the fine metal that it collects on it.
Just a thought.
Jim's chip also cleared up my 4th gear o/d hesitation with my convertor,also

Dan

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JDM Performance Enhanced Mods
Best Truck ET 12.57 104.13 mph in 65' Degree weather
Best ET 12.84 @106.89 mph in 95' degree weather and 90% Hunidity @ FFW 2001 Gainesville, Fla.
Best 60 ft 1.72

 

Thanks for the tip, LB. Its certainly won't hurt to check.

 

Ya I agree call Jim, his chips rock.

Just make sure you tell him about the TransGo valve body. You might also want to ask him about his trans line mod.

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http://donf150.tripod.com/Welcome/id6.html

http://www.zing.com/album/?id=4294607313

13.11 @ 104MPH

 

Alphadoggy, I'm going to take a stab at this. I'm not a trans expert, but can troubleshoot when I have to. I have a couple of questions first.

Did you replace the trans, or have yours rebuilt? Did they do anything with your valvebody, like clean/rebuild, or did they just reinstall it? If it was rebuilt, it's possible that check *****/springs were reinstalled improperly.

It sounds like the trans might not be receiving shift information from the computer. Did your chip changes affect the part throttle shifting? Did the chip changes affect the 2-3 shifts? If not, this might be the answer. You might check to see that the harness that controls the solenoids in the trans were reconnected properly.

You can email me the answers. I have a service manual with diagnostics. It might help.

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Red 00"
Pro-M mass air
Swanson chip
Aluminum driveshaft
Jay Lincoln homemade
traction bars
*******'s bed cover
Wet Okoles
Lightning floor mats
Email: jaylincolncobra@aol.com

"UNLESS YOU'RE THE LEAD DOG, THE VIEW NEVER CHANGES"
http://www.zing.com/album/?id=4292716723

 

Although you ***** on me every time you can,i'll give you my opinion because you are a L owner just as me.Id like to tell ya not to go WOT like you would tell me but I cant.The most likley problem is the speed sensor.Try that before you try anything!!. Good luck,I hope it works out

 

Lightningquick is right. There are (2) separate speed sensors going to the trans., along with two more connectors. One of these may not have been hooked back up after the trans work.

Remember, the PCM uses adaptive logic, so it will learn as you drive. I had the opposite problem when Danny put the chip in my truck. Even though he raised the shift RPM, it still shifted at 5,200. I disconnected the battery for a while, and let the computer relearn the new information as I drove. It now shifts at 5,600, just as programmed.

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Red 00"
Pro-M mass air
Swanson chip
Aluminum driveshaft
Jay Lincoln homemade
traction bars
*******'s bed cover
Wet Okoles
Lightning floor mats
Email: jaylincolncobra@aol.com

"UNLESS YOU'RE THE LEAD DOG, THE VIEW NEVER CHANGES"
http://www.zing.com/album/?id=4292716723

 

99, I checked it today, and it does shift according to the factory parameters without the chip. 5200 rpm, and 4 cylinders shut down. Feels like crap compared to a shift without the power reduction, but at least the boost doesn't cut out. But the odd thing is, as I already pointed out, that when I start in second gear and gas it, at about 3500 rpm it downshifts to first. Then it shifts back to second at the programmed rpm, without hitting the rev limiter or shutting off the boost. Scared the pee out of me the first time it happened, wasn't expecting it and got way sideways. It does this regardless of whether the chip is in or out. With the chip out it upshifts at 5200, with the chip it upshifts at 5500. But I talked to my tranny guy and he said this is NOT supposed to happen at all; if the lever is in second it is not supposed to downshift to 1st no matter how much gas you give it. He does not think it is the speed sensor, nor do I. Just another piece of the puzzle to think about.

 

G,
You should get a Medicine Man to do a dance around your Lightning or have it exorcised by a local Priest. Who knows, maybe it was parked over a burial ground for too long..