Simple question, should I see a priming pulse on injector 1 using noid light at key on with engine cold?
Trying to resolve a cold start issue, will not start without starter fluid. 2-3 rounds of this and it will start to run on its own, and once warm will restart normally. Noid light on injector #1 shows injector pulses during crank but not a prime pulse prior to crank. Setup details:
1995 Miata chassis
1994 SN95 engine with 87k miles, all stock: internals, TB, intake, MAF, injectors, fuel rail, fuel pressure regulator
1989 wiring (Engine, EEC, O2) harness (modified for 94 TPS pigtail, no other changes).
A9L EEC IV
New Autolite 25 plugs, gapped at 0.052
New distributor cap and rotor
Mustang Fuel pump circuit not used, Miata fuel pump runs at key on.
Return fuel system, brand new fuel filter
Air intake temp sensor added to #5 runner (like an 89 would be)
EGR and related removed, head holes plugged, TB hole plugged
Air pump & related removed
Shorty swap headers
No O2's installed (yet, exhaust not built yet) but wiring harness is connected and hanging. O2 harness is correct manual transmission version.
Additional info:
Battery fully charged
94 TPS mounts elongated and position adjusted to 0.95v with KOEO (Initially had 1.27v, and code 23 - Throttle Position Sensor Out Of Self Test Range. Hot idle was 1100rpm. After adjustment, voltage in line with 89 specs, and hot idle is 600rpm)
Fuel pressure at prime is 40psi, measured at stock 5.0 test port on rail. Pressurizes on key on to 'run'.
Verified good grounds to pins 20, 40, 60 of EEC.
Current codes:
Any thoughts appreciated!
Trying to resolve a cold start issue, will not start without starter fluid. 2-3 rounds of this and it will start to run on its own, and once warm will restart normally. Noid light on injector #1 shows injector pulses during crank but not a prime pulse prior to crank. Setup details:
1995 Miata chassis
1994 SN95 engine with 87k miles, all stock: internals, TB, intake, MAF, injectors, fuel rail, fuel pressure regulator
1989 wiring (Engine, EEC, O2) harness (modified for 94 TPS pigtail, no other changes).
A9L EEC IV
New Autolite 25 plugs, gapped at 0.052
New distributor cap and rotor
Mustang Fuel pump circuit not used, Miata fuel pump runs at key on.
Return fuel system, brand new fuel filter
Air intake temp sensor added to #5 runner (like an 89 would be)
EGR and related removed, head holes plugged, TB hole plugged
Air pump & related removed
Shorty swap headers
No O2's installed (yet, exhaust not built yet) but wiring harness is connected and hanging. O2 harness is correct manual transmission version.
Additional info:
Battery fully charged
94 TPS mounts elongated and position adjusted to 0.95v with KOEO (Initially had 1.27v, and code 23 - Throttle Position Sensor Out Of Self Test Range. Hot idle was 1100rpm. After adjustment, voltage in line with 89 specs, and hot idle is 600rpm)
Fuel pressure at prime is 40psi, measured at stock 5.0 test port on rail. Pressurizes on key on to 'run'.
Verified good grounds to pins 20, 40, 60 of EEC.
Current codes:
- 31 - EGR Valve Position/Pressure Feedback EGR Circuit Below Minimum Voltage. 0.24 volts
- EGR system removed, so this makes sense.
- (Have ordered 82 ohm resistor to make eliminator to clear CEL.)
- 67 - Park Neutral Position Switch Circuit Open; A/C On -Manual, Manual Lever Position Sensor Out Of Range/A/C On (CM,O), Clutch Switch Circuit Failure
- The clutch switch is not hooked up, so this makes sense.
- 81 - Secondary Air Diverter Circuit Failure
- Air system removed, so this makes sense.
- (Have ordered 82 ohm resistor to make eliminator to clear CEL.)
- 82 - Secondary Air Bypass Circuit Failure
- Air system removed, so this makes sense.
- (Have ordered 82 ohm resistor to make eliminator to clear CEL.)
- 84 - EGR Vacuum Regulator (EVR) Control Circuit Failure
- EGR system removed, so this makes sense.
- (Have ordered 3.9K/390 ohm resistors to make eliminator triangle to clear CEL.)
- 85 - CANP Circuit Failure
- Canister & purge not installed, so this makes sense.
- (Have ordered 82 ohm resistor to make eliminator to clear CEL.)
- 87 - Primary Fuel Pump Circuit Failure
- not using 5.0 fuel pump circuit, so this makes sense.
- May add +12v feed back top EEC to get rid of this code.. could this be the issue?
Any thoughts appreciated!