Im only familar with wildman/ts chips and tuners. Ive heard of som chips needing the map splice. Anyhow thats wat i think it is. Or is it a smoke switch? I just bought this truck and havnt had time to chase wires. This truck was upgraded at western diesel which is out of biz now....i think..... Anyhow,it has a techni cooler and i think it has a banks quick spool. The hot side of the turbo has the banks name while the cool side has the normal garret name. Im going to pull the pcm tommorrow and see if i see a chip. Does any1 have any expeirence with this 'map' sensor splice? Thanx guys

 

Just pull the e-brake to check for chip. dont' have to pull computer.

 

The only thing i have heard spliced in the map line is a boost gauge line or a regulator to fool the the map to see less than 22 psi so you dont set a over boost code

 

I drop the wheel well. 4 1/4 in screws pull it down about 4 in. Loosen the 2 10mm bolts and wah lah. Ive been thru the ebrake be4. I hate messen with that thing. I know wat your talkin bout tho. Im gonna tear it all down anyhow. Im gonna make this truck into a promotional kinda thing. Its gettin stage 3 hybirds(rosewoods) php tunes,airdogII,reg return,38r turbo....and i havnt made up my mind yet but im leaning towards bts tranny...im deff gonna go with the stealth hpop. Its gonna be a work in progress. One peice at a time....work in progress. Som of the old upgrades im gonna sell. Any1 interested?. I just couldnt remember who used that map splice deal. Banks six gunn? Its a older model watever it is. I hav a long way to go. Hell,i havent even checked compression. The oil cap trick passes in my book,but still gonna screw the compression gauge in.

 

Ahh it does hav a boost fooler from diesel site. But! I dont think the defueling issue was a concern until 99 and above.....dont hold me to it but i think thats correct. Might be the other way around.

 

Ya its more for the over boost code not defueling.

 

nevermind.

 

No,pls do giv your opinion. I promise i wont get butthurt. So anyway,i pulled the pcm and its gotta level 4 banks big hoss module on it. The map sensor is spliced but its only a ground. I followed the line and for som stoooopud reason they grounded it under the truck. So why would u ground the map sensor? The wire thats spliced is the closest 1 to the passenger side... The omron hc5l timer has wires to .....nowere....hmmmm

 

I'm not sure why they would ground that wire to the frame. I have never looked at the MAP wiring diagram before. Maybe someone has the diagram to see if that should be a grounded wire or something.

What I was going to say in the post I deleted above was I wouldn't go with the Airdog or the 38R. The Airdog II has been proven to be fairly unreliable on our trucks. Probably due to the additional pressure we ask our pumps to produce. I would either run an Aeromotive A-1000, Fuelab, or dual SD pumps. Dual SD pumps would probably be the most reliable option since they are stock, known reliable pumps.

The only reason I wouldn't go with the 38R on an OBS is this.. If your going to dig into changing uppipes, manifold, and turbo pedistals, why not just upgrade to an aftermarket T4 kit and run a better turbo like an S400? Which turbo would all depend on what capacity and nozzle size hybrids you plan to use, what power level your wanting, and how you will use the truck. Personally, an externally gated S366, S465, s467, S471, GT4294, GT4294R, and GTX4294R would all be awesome choices for turbos. Which one I would use would depend on the three things I pointed out.

I deleted my above post mostly because you didn't ask for opinions on the setup your looking to run. I can sometimes get carried away giving my opinion when it's not asked for. LOL Plus, some people feel like the 38R is some awesome turbo that can be set up for cheap, but in order to set it up and eliminate the donuts on the uppipes, it's nearly just as expensive as going to a better turbo.

 

The left wire on MAP is +5 volts, the middle wire is output to PCM which is a frequency pulse waveform and the right wire is ground. I'm not familiar with the omorin hc51 timer but suspect it was an attempt to fool the PCM thinking it did not have enough boost and force it to fuel more. There have been many attempts to do this and all have failed. I suspect if you unwrap the MAP wiring harness you enough you would find the real ground .. best guess, unless I was standing in front of your truck and looking.