Troubleshooting!

rob78 · 04-29-2009, 06:54 AM

Hey guys.

So i'm the proud owner of a new-to-me 1987 FC tII! Towed it on a trailer this past weekend. The car cranks all day long but doesn't seem to even try to 'catch'. It will run with a little bit of MAF sensor cleaner sprayed into the intake. The motor has good compression, and originally had no power to the fuel pump. We ran a new wire from fuel pump relay to the pump since the wiring diagram showed no connections or breaks between the relay and pump.

Would a bad clutch switch allow me to turn the motor over but kill fuel? I tested the resistance on the clutch switch and i get 650 ohms of resistance whether the clutch is up or down. It WILL crank without pushing the clutch pedal. So i'm replacing the switch today.

So now i think the injectors aren't pulsing and putting the fuel down. (Unless the clutch switch just kills fuel and not the ability to crank the car.) Does anybody know of a way to check this without taking apart the upper intake manifold? I'm wondering about a relay or set of wires i might be able to take a power probe to.

If you have any info or ideas, please, let me know! Thank you.

Robert

P.S. - quicklist of things i've checked so far.
1. resistance on the connector at the Air Flow Meter.
2. Resistances, power and ground on the fuel pump relay and resistor.
3. clutch switch (tested bad).
4. power and grounds at fuel pump.
5. Fuel pressure going into the fuel rail is good (mid 80's on pressure tester).
6. emptied tank and replaced with new fuel, purged lines up to fuel rail.
7. spark and compression is good.
8. Battery power is good (recharged and did all start attempts with a jump)

04-29-2009, 06:54 AM	#1
rob78 The Newbie Join Date: Apr 2009 Posts: 4 Rep Power: 0	Troubleshooting! Hey guys. So i'm the proud owner of a new-to-me 1987 FC tII! Towed it on a trailer this past weekend. The car cranks all day long but doesn't seem to even try to 'catch'. It will run with a little bit of MAF sensor cleaner sprayed into the intake. The motor has good compression, and originally had no power to the fuel pump. We ran a new wire from fuel pump relay to the pump since the wiring diagram showed no connections or breaks between the relay and pump. Would a bad clutch switch allow me to turn the motor over but kill fuel? I tested the resistance on the clutch switch and i get 650 ohms of resistance whether the clutch is up or down. It WILL crank without pushing the clutch pedal. So i'm replacing the switch today. So now i think the injectors aren't pulsing and putting the fuel down. (Unless the clutch switch just kills fuel and not the ability to crank the car.) Does anybody know of a way to check this without taking apart the upper intake manifold? I'm wondering about a relay or set of wires i might be able to take a power probe to. If you have any info or ideas, please, let me know! Thank you. Robert P.S. - quicklist of things i've checked so far. 1. resistance on the connector at the Air Flow Meter. 2. Resistances, power and ground on the fuel pump relay and resistor. 3. clutch switch (tested bad). 4. power and grounds at fuel pump. 5. Fuel pressure going into the fuel rail is good (mid 80's on pressure tester). 6. emptied tank and replaced with new fuel, purged lines up to fuel rail. 7. spark and compression is good. 8. Battery power is good (recharged and did all start attempts with a jump)