LQ4 harness mod and ECU reflash
#1
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I will be soon installing a '02 LQ4 and a T56 in my '52 Chevy truck. I have the complete wiring harness but will need to have it cleaned up. I will also need to have the ECU re-flashed and tuned. I have been searching and came up with some good info. but would like some suggestions regarding this set up. I not opposed to cleaning up the harness myself but I am hesitant. Who is the preferred harness vendor? I will also need a reputable vendor to re-flash my ECU. Thanks in advance for any assistance.
![LQ4 harness mod and ECU reflash-100_1542.jpg](https://ls1tech.com/forums/attachments/conversions-swaps/188650d1469142490t-lq4-harness-mod-ecu-reflash-100_1542.jpg)
![LQ4 harness mod and ECU reflash-100_1554.jpg](https://ls1tech.com/forums/attachments/conversions-swaps/188651d1469142490t-lq4-harness-mod-ecu-reflash-100_1554.jpg)
![LQ4 harness mod and ECU reflash-100_1563.jpg](https://ls1tech.com/forums/attachments/conversions-swaps/188652d1469142490t-lq4-harness-mod-ecu-reflash-100_1563.jpg)
![LQ4 harness mod and ECU reflash-100_1542.jpg](https://ls1tech.com/forums/attachments/conversions-swaps/188650d1469142490t-lq4-harness-mod-ecu-reflash-100_1542.jpg)
![LQ4 harness mod and ECU reflash-100_1554.jpg](https://ls1tech.com/forums/attachments/conversions-swaps/188651d1469142490t-lq4-harness-mod-ecu-reflash-100_1554.jpg)
![LQ4 harness mod and ECU reflash-100_1563.jpg](https://ls1tech.com/forums/attachments/conversions-swaps/188652d1469142490t-lq4-harness-mod-ecu-reflash-100_1563.jpg)
![LQ4 harness mod and ECU reflash-100_1564.jpg](https://ls1tech.com/forums/attachments/conversions-swaps/188653d1469142490t-lq4-harness-mod-ecu-reflash-100_1564.jpg)
#2
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I called a few wiring vendors regarding my project. I may have my harness modded instead of doing it my self. $450.00 seems a little expensive to mod a wiring harness but it may be worth it in the end. I still need a good tuner to reflash my ECU, any ideas?
#3
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John at Speartech is very good.. also Jesse at Wait4meperformance, Currentperformance.. many of the other sponsors and vendors on this site...
Both can do the reflashing and return your harness and ECM.. I used Jesse for my ECM.. wiring was done my me and a friend. Jesse charged $85 for the retune and shipping..
Both can do the reflashing and return your harness and ECM.. I used Jesse for my ECM.. wiring was done my me and a friend. Jesse charged $85 for the retune and shipping..
#4
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We used Current Performance in Tampa to make our harness for our 1998 LQ4/4L60E Jimmy project. Easy as pie to hook up. Now on my 94 GMC fullsize 5.3/4L60E swap, I modded my own harness, didnt take any time at all.
#6
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Whoever you go with ensure you get a OBD2 port, check engine lamp, fan relays, fuel pump relays and all the fuses. Ask the Q's before laying out the cash. Some vendors leave out the necessary stuff and you have to add tons of connections just to get the car started.
I sent you a PM too regarding programming.
I sent you a PM too regarding programming.
Last edited by aknovaman; 07-22-2009 at 07:29 AM.
#7
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Whoever you go with ensure you get a OBD2 port, fan relays, fuel pump relays and all the fuses. Ask the Q's before laying out the cash. Some vendors leave out the necessary stuff and you have to add tons of connections just to get the car started.
I sent you a PM too regarding programming.
I sent you a PM too regarding programming.
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