The 1947 - Present Chevrolet & GMC Truck Message Board Network
Page 1 of 3 1 23
Show 40 post(s) from this thread on one page

The 1947 - Present Chevrolet & GMC Truck Message Board Network (https://67-72chevytrucks.com/vboard/index.php)
-   LSx Swaps (https://67-72chevytrucks.com/vboard/forumdisplay.php?f=206)
-   -   PSI Conversions (https://67-72chevytrucks.com/vboard/showthread.php?t=508257)

mooseknuckles 02-10-2012 01:52 PM
PSI Conversions
 
5 Attachment(s)
My harness and reflashed pcm from PSI showed up in the mail today...I'm impressed with it so far...I have heard some horror stories tho, but as far as I can tell everything looks awesome...

Kim57 02-10-2012 04:02 PM
Re: PSI Conversions
 
I hope it all works out as I sent them my TCM.
I'm also using them for a new harness and ECM on my LS swap.
What horror stories have you heard?
Kim

mooseknuckles 02-10-2012 05:05 PM
Re: PSI Conversions
 
Quote:
Originally Posted by Kim57 (Post 5179504)
I hope it all works out as I sent them my TCM.
I'm also using them for a new harness and ECM on my LS swap.
What horror stories have you heard?
Kim
I've heard that some connectors fall off, and some are miss-matched, but everything looks ok to me....I got them to send me a used pcm with a reflash to save time and shipping, plus it was only $200 vs the $150 for a flash....

harnalien 02-10-2012 05:39 PM
Re: PSI Conversions
 
I got a harness from them and one of the fuel injector connectors was broken. Other than that, not bad for the price.

Kim57 02-10-2012 06:25 PM
Re: PSI Conversions
 
Quote:
Originally Posted by mooseknuckles (Post 5179608)
I've heard that some connectors fall off, and some are miss-matched, but everything looks ok to me....I got them to send me a used pcm with a reflash to save time and shipping, plus it was only $200 vs the $150 for a flash....
That doesn't sound to bad.
I'm getting the same deal on the ECM.

Quote:
Originally Posted by harnalien (Post 5179676)
I got a harness from them and one of the fuel injector connectors was broken. Other than that, not bad for the price.
How hard was it to replace?
Kim

clinebarger 02-10-2012 11:58 PM
Re: PSI Conversions
 
Quote:
Originally Posted by Kim57 (Post 5179748)
How hard was it to replace?
Kim
I Fixed that on harnalien's truck with a GM replacment plug/pigtail. Not hard at all, The rest of the plugs were fine. Harnalien's harness is the only PSI harness ive messed with but from what I saw it looked OK.

Kim57 02-11-2012 12:31 PM
Re: PSI Conversions
 
Quote:
Originally Posted by clinebarger (Post 5180456)
I Fixed that on harnalien's truck with a GM replacment plug/pigtail. Not hard at all, The rest of the plugs were fine. Harnalien's harness is the only PSI harness ive messed with but from what I saw it looked OK.
Thanks.
this is my first time dealing with this type of engine swap so it's all new to me.
I'm hoping for the best from these guys as money is tight and they had the best price for what I needed.
I went with them as another member used them and was happy with the outcome.
Kim

19seventeeCustom 02-11-2012 05:21 PM
Re: PSI Conversions
 
looks great, and I love to hear some great stuff about PSI.
I'm going with their harness and tune for my swap, unless
someone can recommend another with the same price,quality,
and customer service??

mooseknuckles 02-11-2012 08:16 PM
Re: PSI Conversions
 
4 Attachment(s)
mocked up the harness on my motor today to see how it fit.....looks real good so far...only problem I found was, there is no connector for the oil pressure, and I may need a different MAF cause mine is out of a van and the connector's arent the same...

mooseknuckles 02-11-2012 08:18 PM
Re: PSI Conversions
 
5 Attachment(s)
more...

mooseknuckles 02-11-2012 08:19 PM
Re: PSI Conversions
 
1 Attachment(s)
last one...

19seventeeCustom 02-11-2012 11:30 PM
Re: PSI Conversions
 
harness looks great!!

gonna be ordering close to the same
within a week or 2.

Kim57 02-12-2012 12:53 AM
Re: PSI Conversions
 
Looks good.
I should be getting mine some time next week. I'm getting a MAF from PSI because I didn't have one.
Kim

mooseknuckles 02-12-2012 01:05 AM
Re: PSI Conversions
 
I should've done that too...

ls1nova71 02-12-2012 12:00 PM
Re: PSI Conversions
 
Vans use a smaller MAF you probably need a truck one but they're not too expensive in salvage yards and very plentiful. On the oil pressure, the PCM doesn't use it, it was only for the original trucks gauge.
Posted via Mobile Device

mooseknuckles 02-12-2012 12:21 PM
Re: PSI Conversions
 
1 Attachment(s)
Quote:
Originally Posted by ls1nova71 (Post 5183118)
Vans use a smaller MAF you probably need a truck one but they're not too expensive in salvage yards and very plentiful. On the oil pressure, the PCM doesn't use it, it was only for the original trucks gauge.
Posted via Mobile Device
I was thinkin that also....thanks for the confirmation man!....now got any info on the trans switch for me?....my harness only has three connections, one big round one and two smaller ones, nothin that connects to the switch in the pic.?

ls1nova71 02-12-2012 01:34 PM
Re: PSI Conversions
 
Are you running a 4l80e? The two small plugs are the input and output speed sensors, the big round one is the main plug to control the trans, and the one pictured is the neutral safety/back up lights/range sensor for the PRNDL on the dash. You don't really need it, but it is good to have it at least hooked up so that the PCM knows what gear it's in. But if your harness doesnt have a plug for it I guess that's not an option. Is there a wire in your harness that they say to hook up to your original neutral safety switch? It would be grounded in park and neutral.

mooseknuckles 02-12-2012 02:02 PM
Re: PSI Conversions
 
yeah...4l80e...I guess they deleted that switch...not sure on the neutral saftey switch, but I think I got to run that 4 pin brake pedal switch...

clinebarger 02-12-2012 08:21 PM
Re: PSI Conversions
 
Is your harness setup for a 4L60E? That would explain not having a ISS connector, How many wires are going to the "big" plug? 11 or 13.

mooseknuckles 02-12-2012 09:16 PM
Re: PSI Conversions
 
1 Attachment(s)
4l80e..cant remember....and very hard to see in this pic...

mooseknuckles 02-12-2012 09:37 PM
Re: PSI Conversions
 
Quote:
Originally Posted by ls1nova71 (Post 5183310)
Are you running a 4l80e? The two small plugs are the input and output speed sensors, the big round one is the main plug to control the trans, and the one pictured is the neutral safety/back up lights/range sensor for the PRNDL on the dash. You don't really need it, but it is good to have it at least hooked up so that the PCM knows what gear it's in. But if your harness doesnt have a plug for it I guess that's not an option. Is there a wire in your harness that they say to hook up to your original neutral safety switch? It would be grounded in park and neutral.
there are wires for park/neutral and a brake signal.

mooseknuckles 02-13-2012 07:03 PM
Re: PSI Conversions
 
1 Attachment(s)
11 pin

ls1nova71 02-13-2012 09:16 PM
Re: PSI Conversions
 
Quote:
Originally Posted by mooseknuckles (Post 5184295)
there are wires for park/neutral and a brake signal.
Then you can just take the NSS off the side of the transmission.

mooseknuckles 02-13-2012 09:18 PM
Re: PSI Conversions
 
Quote:
Originally Posted by ls1nova71 (Post 5186522)
Then you can just take the NSS off the side of the transmission.
is that all that is...is a fancy neutral safety switch?

ls1nova71 02-13-2012 09:32 PM
Re: PSI Conversions
 
Pretty much, although it does also run the PRNDL on the dash of the original truck.


All times are GMT -4. The time now is 08:31 PM.
Page 1 of 3 1 23
Show 40 post(s) from this thread on one page

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com