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The Terminator
Engine/Tuning
Cobra still stalls after FPRS change??
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<blockquote data-quote="1HUBCAP" data-source="post: 11756071" data-attributes="member: 61105"><p>I sold my cobra to a local guy,and it died on him at idle. At first i was convinced that it was the sensor. He changed it and all was well untill today.Died on him at idle in a drive through. I know the PPRV delete is guilty of causing problems with hesitation between shifts. Here is the code it is throwing:</p><p></p><p> P1237=Fuel Pump Secondary Circuit (Fuel Pump Driver Module) </p><p></p><p>Electronic Returnless Fuel Systems (ERFS) utilize a Fuel Pump Driver Module (FPDM) to control fuel pressure. The PCM uses a Fuel Rail Pressure Sensor (FRP) for feedback. The PCM outputs a duty cycle to the FPDM to maintain the desired fuel rail pressure. During normal operation, the PCM will output a FP duty cycle from 5% to 51%. The FPDM will run the fuel pump at twice this duty cycle, e.g. if the PCM outputs a 42% duty cycle, the FPDM will run the fuel pump at 84%. If the PCM outputs a 75% duty cycle, the FPDM will turn off the fuel pump. As far as the code..</p><p> </p><p>If the FPDM does not out any diagnostic signal, (0 or 100% duty cycle), the PCM sets a P1233 DTC. This DTC is set if the FPDM loses power. This can also occur if the Inertia Fuel Switch is tripped.</p><p> </p><p>If the FPDM outputs a 25% duty cycle, it means that the fuel pump control duty cycle is out of range. This may occurs if the FPDM does not receive a valid control duty cycle signal from the PCM. The FPDM will default to 100% duty cycle on the fuel pump control output. The PCM sets a P1235 DTC.</p><p> </p><p>If the FPDM outputs a 75% duty cycle, it means that the FPDM has detected an open or short on the fuel pump control circuit. The PCM sets a P1237 DTC.</p><p> </p><p>Here is the list of mods:</p><p>All are bolt ons </p><p>Steg Stage 5 Blower </p><p>2.76 LFP upper pulley </p><p>4 # LFP lower pulley </p><p>3.2 Alt pulley </p><p>LFP Idler Pulleys </p><p>Acufab TB and Plenum </p><p>Diablosport Mafia mass air extender </p><p>60 lb injectors </p><p>Kenne Bell BAP wired hot all the time </p><p>PPRV delete </p><p>SCT X3 with custom blower tune and custom nitrous tune </p><p>NOS nitrous wet kit with plate system pilled at .044 or 90 shot </p><p>Bottle heater with safety cutoff </p><p>Bottle pressure gauge </p><p>Safety blow down tube </p><p>Custom nitrous purge with solenoid and purge coming thru the cobra in front </p><p>LFP dual pass heat exchanger </p><p>IRS brace </p><p>Magnaflow cat back </p><p>Off road X pipe </p><p>K+N filter </p><p>Even flow cooling mod </p><p>Ngk BR7EF plugs </p><p>P-Fab intercooler ice box </p><p>Spec alum flywheel </p><p>Spec Stage 2+ clutch 26 spline </p><p>26 spline input shaft by Liberty with correct shim </p><p>Hardened TOB reatiner </p><p>Fiore firewall adjuster and quandrant </p><p>LDC freeplay kit </p><p>MGW shifter </p><p>Home made 1/8th inch subframe connectors with 1/8th plate at torque box </p><p>Driveshaft safety loop </p><p>WOT Box </p><p>Dynojet wideband commander </p><p>Boost and fuel gauges </p><p>raptor shift light </p><p>nitto drag radials </p><p></p><p>:shrug:</p></blockquote><p></p>
[QUOTE="1HUBCAP, post: 11756071, member: 61105"] I sold my cobra to a local guy,and it died on him at idle. At first i was convinced that it was the sensor. He changed it and all was well untill today.Died on him at idle in a drive through. I know the PPRV delete is guilty of causing problems with hesitation between shifts. Here is the code it is throwing: P1237=Fuel Pump Secondary Circuit (Fuel Pump Driver Module) Electronic Returnless Fuel Systems (ERFS) utilize a Fuel Pump Driver Module (FPDM) to control fuel pressure. The PCM uses a Fuel Rail Pressure Sensor (FRP) for feedback. The PCM outputs a duty cycle to the FPDM to maintain the desired fuel rail pressure. During normal operation, the PCM will output a FP duty cycle from 5% to 51%. The FPDM will run the fuel pump at twice this duty cycle, e.g. if the PCM outputs a 42% duty cycle, the FPDM will run the fuel pump at 84%. If the PCM outputs a 75% duty cycle, the FPDM will turn off the fuel pump. As far as the code.. If the FPDM does not out any diagnostic signal, (0 or 100% duty cycle), the PCM sets a P1233 DTC. This DTC is set if the FPDM loses power. This can also occur if the Inertia Fuel Switch is tripped. If the FPDM outputs a 25% duty cycle, it means that the fuel pump control duty cycle is out of range. This may occurs if the FPDM does not receive a valid control duty cycle signal from the PCM. The FPDM will default to 100% duty cycle on the fuel pump control output. The PCM sets a P1235 DTC. If the FPDM outputs a 75% duty cycle, it means that the FPDM has detected an open or short on the fuel pump control circuit. The PCM sets a P1237 DTC. Here is the list of mods: All are bolt ons Steg Stage 5 Blower 2.76 LFP upper pulley 4 # LFP lower pulley 3.2 Alt pulley LFP Idler Pulleys Acufab TB and Plenum Diablosport Mafia mass air extender 60 lb injectors Kenne Bell BAP wired hot all the time PPRV delete SCT X3 with custom blower tune and custom nitrous tune NOS nitrous wet kit with plate system pilled at .044 or 90 shot Bottle heater with safety cutoff Bottle pressure gauge Safety blow down tube Custom nitrous purge with solenoid and purge coming thru the cobra in front LFP dual pass heat exchanger IRS brace Magnaflow cat back Off road X pipe K+N filter Even flow cooling mod Ngk BR7EF plugs P-Fab intercooler ice box Spec alum flywheel Spec Stage 2+ clutch 26 spline 26 spline input shaft by Liberty with correct shim Hardened TOB reatiner Fiore firewall adjuster and quandrant LDC freeplay kit MGW shifter Home made 1/8th inch subframe connectors with 1/8th plate at torque box Driveshaft safety loop WOT Box Dynojet wideband commander Boost and fuel gauges raptor shift light nitto drag radials :shrug: [/QUOTE]
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Cobra still stalls after FPRS change??
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