Lq4 Wiring Harness Modification

Psi sells standalone wiring harnesses for gm gen ii iii iv v ls lt based engines and transmissions. These harnesses include the gen ii lt1 lt4 gen iii 24x ls1 ls6 and vortec truck engines as well as gen iv 58x ls2 ls3 ls7 vortec and gen v lt ecotec3 engines. Modifying a factory lq4 wiring harness.

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Lq4 wiring harness modification. Also can use the 99 02 red blue connector pcm with some additional modifications. Jump to latest follow. We re configure and tail out what needs to be used to run the engine and transmission correctly at full power. We offer ls lt swap harnesses for all gen 3 4 and 5 ls lt engines including ls1 ls2 ls3 ls6 ls7 lsa ls9 gen 5 v8 lt1 lt4 lq4 lq6 l99 vortec variants dod vvt afm.

We would like to show you a description here but the site won t allow us. General chit chat general 4x4 discussion toyota truck and 4runner vehicles and trailers for sale axles tires wheels for sale. Gm wiring modification of ls and lt wiring systems. Drive by wire to cable throttle conversion use 03 harness pcm to go back to cable throttle control.

The wire in painless performance kits runs a little larger than the standard. The larger wires that feed heavy draw circuits are typically 14 to 12 gauge. All psi harnesses are made in the usa. This is a very complete service we offer the wire harness also will look new.

My lq9 harness did not have enough wire length to reach the upper inside of the passenger fender. Primary wire is typically an 18 gauge wire and is the most common wire found in wiring harnesses. The lq4 mounts the ecu up front. You must have the harness off of the donor lt1 tpi ls1 engine undamaged.

Speartech also provides ecm programming including e38 e67 e40 e92 ls lt engine wiring harness reworks and conversion adapters and programming. Drive by wire electric throttle control info explaining drive by wire and hooking up cruise control on drive by wire setups. Speartech is your ls lt wiring harness swap specialist. The wiring for dbw cc is over at the lt1 site too.

Lq4 wire harness the lq4 vin u 6000 engine is an awesome gm power plant similarly related by looks to the 4 8 lr4 5 3 lm7 but is massively in a class of it own. This engine is the foundation for a stroker motor and when you need more room the lq4 engine is the suburban of the ls blocks. To get it working you ll need a gm signal stalk. You ll need extra fuses relays for the fuel pump and electric fans.

The primary wires are 16 gauge with 12 gauge for heavy draw items such as the headlights. I mounted mine on the firewall passenger side.