Crank but no fuel or spark, MSPNPPro
#1
Thread Starter
Senior Member
iTrader: (8)
Joined: Mar 2006
Posts: 1,108
Total Cats: 233
From: Indianapolis, IN
Crank but no fuel or spark, MSPNPPro
I'm out of things to try, and have started to lose hope and patience for my project. Any other ideas of things to check?
Configuration:
Vehicle: Exomotive Exocet Sport
Harness: 99 body and engine harness, greatly cut down for use in my Exocet. 99 donor ran and drove fine for 18 months before I stripped it down. VVT COPs have been re-wired to 99 harness coil wires. VVT solenoid is not yet wired to the MS.
Engine: JDM BP6 VVT engine
ECU: MSPNPPRO99-00
Injectors: GT500 w/ FlowForce install kit. Using the Exomotive fuel kit, which replaces the hard lines w/ -6AN lines.
2 gallons of fresh 93 added to tank last night before trying to fire it up
Situation: turning the key powers the starter and causes engine to turn over, but there is no combustion. Pulled a spark plug out to verify no spark, and the fresh spark plugs are not getting wet from fuel. TPS and coolant temp sensor are passing correct values to TunerStudio, but RPMSs are showing as 0. Tried multiple logs during cranking and none recorded any data.
Troubleshooting done so far: traced back wires for ignition coils, #4 injector, fuel pump, and cam sensor. Verified that all connections are getting 12V and the grounds are all common to chassis and engine ground points (I have rivnuts for 3 chassis grounds (one by fuel pump, one each on passenger and driver side of car. Removed enough systems (lights, windows, stereo, HVAC, windows, door locks, defroster, wipers, etc.) that I consolidated 2 grounding points on the driver's side), engine ground next to dipstick is currently grounded to same place as the driver's side ground, and signal wires for ECU for these circuits are continuous to the ECU pins. Verified signal wires for cam and crankshaft sensors are 5V on the harness side, and moving something ferrous past the sensor causes the voltage to change from 5v to 1.75v, which as far as I can tell indicates those sensors are functioning properly. Verified correct orientation of the crank trigger wheel. Tried basemaps from DIY for both the 99-00 and 01-05 MSPNPPro. Tried a new crankshaft sensor, which gave the same results in a manual test as the original sensor.
Configuration:
Vehicle: Exomotive Exocet Sport
Harness: 99 body and engine harness, greatly cut down for use in my Exocet. 99 donor ran and drove fine for 18 months before I stripped it down. VVT COPs have been re-wired to 99 harness coil wires. VVT solenoid is not yet wired to the MS.
Engine: JDM BP6 VVT engine
ECU: MSPNPPRO99-00
Injectors: GT500 w/ FlowForce install kit. Using the Exomotive fuel kit, which replaces the hard lines w/ -6AN lines.
2 gallons of fresh 93 added to tank last night before trying to fire it up
Situation: turning the key powers the starter and causes engine to turn over, but there is no combustion. Pulled a spark plug out to verify no spark, and the fresh spark plugs are not getting wet from fuel. TPS and coolant temp sensor are passing correct values to TunerStudio, but RPMSs are showing as 0. Tried multiple logs during cranking and none recorded any data.
Troubleshooting done so far: traced back wires for ignition coils, #4 injector, fuel pump, and cam sensor. Verified that all connections are getting 12V and the grounds are all common to chassis and engine ground points (I have rivnuts for 3 chassis grounds (one by fuel pump, one each on passenger and driver side of car. Removed enough systems (lights, windows, stereo, HVAC, windows, door locks, defroster, wipers, etc.) that I consolidated 2 grounding points on the driver's side), engine ground next to dipstick is currently grounded to same place as the driver's side ground, and signal wires for ECU for these circuits are continuous to the ECU pins. Verified signal wires for cam and crankshaft sensors are 5V on the harness side, and moving something ferrous past the sensor causes the voltage to change from 5v to 1.75v, which as far as I can tell indicates those sensors are functioning properly. Verified correct orientation of the crank trigger wheel. Tried basemaps from DIY for both the 99-00 and 01-05 MSPNPPro. Tried a new crankshaft sensor, which gave the same results in a manual test as the original sensor.
#3
Thread Starter
Senior Member
iTrader: (8)
Joined: Mar 2006
Posts: 1,108
Total Cats: 233
From: Indianapolis, IN
I traced both wires back to ECU and they are continuous. They also are both getting 5V from the ECU, which changes to 1.75V when waving a piece of steel in front of each of the sensors.
#4
Thread Starter
Senior Member
iTrader: (8)
Joined: Mar 2006
Posts: 1,108
Total Cats: 233
From: Indianapolis, IN
Also, I have removed all the wiring for the stock gauge cluster, as I will be running a Dash2 via CAN from the MS. Is there something in the cluster that would keep an engine from starting if the cluster is completely removed? The wiring diagrams didn't seem to indicate any issues when I was purging the body harness.
#6
Thread Starter
Senior Member
iTrader: (8)
Joined: Mar 2006
Posts: 1,108
Total Cats: 233
From: Indianapolis, IN
Ignition settings are the default 99-05 miata settings in the stack basemaps downloaded from DIY (megasquirtpnp.com). If I knew why it wasn't coming through I wouldn't be bothering everyone by posting here ;-)