JacobJ

I recently completed an L83 swap, which included an engine, transmission, ecu, and MAF all from the same donor vehicle. Was told it was a 2014 but computer shows 2015. it has the 6 speed 6l80e.

Engine starts, runs smooth, and when I hoop up VCM scanner it shows the throttle position correctly as I push the accelerator. however, the engine is completely unresponsive regardless of what gear, park / neutral, etc. not even a blip.

I am running a standalone fuel system set to 74 PSI, not the factory PWM. I have a code P018c Fuel Pressure Sensor B Circuit Low; and P0192 Fuel Rail Pressure Sensor A Circuit Low. Could this be an issue? how do I combat this limp mode?

brandon6.0

iTrader: (32)

Wrong throttle pedal. U need to change 2 wires around wether its a corvette or truck pedal. Had same issue on a c10 l83 swap. Throttle wouldnt do anything. Call speartech they can tell u what 2 wires to swap.

JacobJ

I've tried calling speartech a couple times with no luck.
Ordered a GM throttle pedal for a 2014 silverado though, should be here soon

JacobJ

Still need some help on this please

I tried a GM throttle pedal out of the matching vehicle and same issue, no change..

Here are my DTCs

0x7E8: P0073 - Ambient Air Temperature Sensor Circuit High (Permanent)
0x7E8: P0151 - O2 Circuit Low Voltage (Bank 2, Sensor 1) (Permanent)
0x7E8: P057C - Brake Pedal Position Sensor Circuit Low (Permanent)
0x7E8: P2138 (Permanent) Throttle / Pedal Position Sensor D/E Correlation


Any thoughts?

I've tried calling and emailing speartech with no luck. they must be busy or out all week

JacobJ

I verified that I have two wires with 5volts as they should be. I believe the wiring is correct

brandon6.0

iTrader: (32)

Are u sure thats the original throttle pedal for the setup? Did u order a custom harness? Had same issue and swapped 2 wired problem solved. I got a thread on it in the genV section. States what 2 wires to swap.

We ordered a harness from speartech and they had it wired for a corvette pedal when we had a truck pedal

JacobJ

Looks like I had two of the gas pedal wires mixed up when I wired in the gas pedal harness. Oddly enough the computer was still reading the position but I fixed the two wires and now it responds to the gas pedal. This was my mistake, and a little bit of tracing wires fixed it! thanks for the response.

wpsemple

Reviving this thread, I have an L83 in my Scout II and I keep throwing the same codes. My biggest issue is there's turnover but no spark. Was the fuel pressure killing your engine when you were running it? Would it start slow?

brandon6.0

iTrader: (32)

U can actually run a l83 setup at the normal 58psi fuel pressure. 70psi + will eventually kill your fuel pump if its not up to the task.

wpsemple

Gotcha. I swapped two wires after talking to Current Performance, and that fixed the pedal Error. The engine will turn, but there's no crank and it keeps throwing the P0192. My fuel tank and pump seem to be working fine... I'm stumped.

Rolandgonzo

What wires were mixed up? I am having the same problem.

Blackdog76

Same issue here. What wires???

Stanson Moore

What 2 wires did you change or is this something you realy do not no what 2 wire where change

G Atsma

JacobJ hasn't been here for over 3 years.