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I have a 92 Brumby that cranks ok but wont start. It has no spark and I cant hear the fuel pump start when the key is turned. Have replaced the coil as was leaking oil but this made no difference. So I believe the engine revolution unit has failed. Has anyone bypassed or repaired one of these ??

fuses ??

Fuses checked ,fusible links checked and ignition switch checked . from wiring diagram the engine revolution sensor or unit is common for no fuel pump or spark occuring.not to sure how to check it though.

engine revolution sensor escapes me ? have you tried power and earth at the pump, or bypass to diagnose?

fuel or no spark your problem? Igntion module inside dizzy can give no spark situation. Try aerostart intake to see if it fires if you have spark it should run for a moment - if that is the case you need to pursue fuel, simple

Have tried aerostart definately no spark . have not tried to bypass or direct power fuel pump yet . will give a go go tomorow. I have notice low brake fluid warning has appeared on dash even though it is full. now concerned a dodgy earth point somewhere.

Sounds like an earth Problem, maybe the main one to the body?

The circuit doesn't look that hard to bypass the Engine revolution sensor.

The pump and the sensor rely on body earth.

Check continuity from Negative Battery post to body, should be near enough 0 ohms.

not another ig module ?

have located and removed revolution unit . It has strong electrical burning smell coming from it. Waiting now to hear from local dealer on if I can get a replacement unit ..

where was it and what does it look like ?

Part number 22631AA100 $415.00 RETAIL
NIL STOCK AUSTRALIA

FROG wrote:Part number 22631AA100 $415.00 RETAIL
NIL STOCK AUSTRALIA

ya nice price i got to buying some thing new now as 2 hand haft the time it will need replaceing not long after ..
ya Ing mod cost lots for all car

Its a little 50mm by 50mm black box that hides on firewall above the fuse box under the dash. Correct about nil stock , At least 2 weeks to come from Japan.

can you do a photo to save me crickin' my neck. I may have one not in use.

Number of connector pins ? Wire colours ?

Has it got the part number on it?

Part number is written on top of box 22631AA100 [ATTACH]2688[/ATTACH]

OK, never seen one of these in my travels. I wonder if it is pre 84 component, as mine is 10/84 Brumby. Also parted out 3/84 sedan. Come to think of things, mine was supposed to have some sort of fuel cut solenoid in the carby, but was more pollution than safety I am certain. I am of no help to you on this, sorry, but thanks for the pics, does help !

Are you sure you hooked the ignition coil up right?

There is a wire from the coil that feeds the rev unit.

Have you tried to see if there is power at the fuel pump relay?

Excuse my ignorance but what does this 'lil fella do and how does it work?

It senses engine rotation from the coil pulses and turns the fuel pump on. If the engine stops, so does the fuel pump.

When the ignition switch is turned to on, it comes on for 2 seconds to prime the fuel system

I can get the fuel pump to run with a jumper across the plug on the sensor and yes reconnected coil very carefully when changed and double checked. From smell emanating from rev unit subi dealer said it cactus .