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WHY DOES MY VEHICLE RUN BAD WITH MAF PLUGGED IN BUT RUNS GOOD WITH MAF UNPLUGGED?
NO MAF READING (0V)
• Check MAF fuse. If fuse is good, check that the MAF you are using is
wired correctly for the harness you ordered.
WHY DOES MY VEHICLE RUN BAD WITH MAF PLUGGED IN BUT RUNS GOOD WITH MAF UNPLUGGED?
DTC P0102 (LOW FREQUENCY MAF)
• Check that MAF you are using is wired correctly for the harness you
ordered.
WHY DOES MY THROTTLE BODY NOT WORK?
• GM drive by wire (DBW) systems require that components integral to the
system (Pedal, Throttle Body, Throttle Actuator Control Module (Gen III
applications only)) are matched to work together. This includes the
tune which must have the correct programming to match your throttle
components as well. If these steps are not followed a lack of throttle
response may ensue.
• Check brake switch wiring.
• Call PSI Tech Support with further
questions.
WHY DOES MY FUEL PUMP RELAY CONSTANTLY CLICK?
• This relay is grounded in by the PCM wiring harness grounding lugs.
Check that the lugs are tightened the rear of the driver’s cylinder
head and that the surface on the engine is clean. Also ensure that the
battery, engine and vehicle are grounded properly. Reference the PSI
Engine Ground Diagram.
• If Grounding checks out, contact PSI to
ensure that the tune is set for ‘Constant’ fuel pump signal and not
‘PWM’ signal.
About
Looking for an Affordable, In Stock, Plug and Play wiring harness for your LS Swap? 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. All PSI Harnesses are Made in the USA. In addition to wiring harnesses, PSI carries Holley Products, Vintage Air A/C, Dakota Digital Gauges, HPTuners and PCM programming, Fuel Pump Kits, Engine Sensors, Extension Harnesses, Replacement GM connector pigtails and a complete line of hardware to complete your conversion needs!
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Contacts
2029 Route 88
Brick, NJ 08724
ph. 732-276-8589 Mon-Fri: 8:00am to 6:00pm ET
customerservice@psiconversion.com
sales@psiconversion.com
techsupport@psiconversion.com