Non Starting After Engine Swap

[dino20vt 3]

I'll probably confuse myself and you lot if I go into to too much detail, but basically:

 

I took a 1.9 mi16 engine out of 205 and replaced it with a 1.9 8v, it turns over but will not start due to no fuel reaching the rail.

Checked the pump wiring and no power is reaching it.

So checked the relay and theres no voltage leaving there either on wire 76

 

Took the lid off of the relay, manually operated it and the pump would operate.

 

Unfortunately the battery was dying so couldnt test if the car would fire into life.

 

So what im asking is, what wire/s energises the coil in the relay?

 

Wire 32a yellow on the relay did go to an alarm but ive bypassed that now, that goes to pin 9 on the larger brown plug, then leaves the loom through the bulkhead on thicker red cable (no numbers), im suspecting it terminates on the coil.

 

Talking of coils one of the two red wires on the coil again was part of the alarm circuit but its been wired through, am I correct in thinking the two red wires connect to the positive side of the loom and the grey/green wires and yellow/green wires connect to the negatve?

 

Finally discovered a plug dangling in front of the battery, its red, 2 pin and has two wires, brown and green.

 

Sorry for all the questions,

 

Cheers

[sub205 5]

I'll probably confuse myself and you lot if I go into to too much detail, but basically:

 

I took a 1.9 mi16 engine out of 205 and replaced it with a 1.9 8v, it turns over but will not start due to no fuel reaching the rail.

Checked the pump wiring and no power is reaching it.

So checked the relay and theres no voltage leaving there either on wire 76

 

Took the lid off of the relay, manually operated it and the pump would operate.

 

Unfortunately the battery was dying so couldnt test if the car would fire into life.

 

So what im asking is, what wire/s energises the coil in the relay?

 

Wire 32a yellow on the relay did go to an alarm but ive bypassed that now, that goes to pin 9 on the larger brown plug, then leaves the loom through the bulkhead on thicker red cable (no numbers), im suspecting it terminates on the coil.

 

Talking of coils one of the two red wires on the coil again was part of the alarm circuit but its been wired through, am I correct in thinking the two red wires connect to the positive side of the loom and the grey/green wires and yellow/green wires connect to the negatve?

 

Finally discovered a plug dangling in front of the battery, its red, 2 pin and has two wires, brown and green.

 

Sorry for all the questions,

 

Cheers

 

the plug is for the fan relay box found f.e. in the gentry.

check if the ecu gets power, then check the crankshaft sensor located on top of the gearbox.

whats the engine from?

is it an 102 or 128ps engine? then your flywheel has no teeth and the engine will not run on motronic ecus because the CAS gets no signal!

[dino20vt 3]

the plug is for the fan relay box found f.e. in the gentry.

check if the ecu gets power, then check the crankshaft sensor located on top of the gearbox.

whats the engine from?

is it an 102 or 128ps engine? then your flywheel has no teeth and the engine will not run on motronic ecus because the CAS gets no signal!

The engine is the 128 bhp unit running jetronic, where's the cramkshaft sensor? I found what looked like a switch below the clutch arm, but I assumed it was the reverse switch.

 

So the red plug is unused?

How do I check for power to the ecu?

Thanks

[dino20vt 3]

Just a thought, the block is early phase 1 309 gti that DID run a strange loom which I swapped for an early phase 1.5 loom, this loom connects to the 309 ATM and ecu. Am I possibly having compatibility issues mixing a later loom with an early ecu and afm?

[large 33]

If you are running jetronic set up you don't need a crank angle sensor.

The first thing I would do is bell out that red wire you have feeding the tac relay to find out were it comes from.

[sub205 5]

are you running this engine with the electronics the mi16 was running with?

mi16 is normally motronic (147ps) and this ecu/wiring loom is unable to run the 128ps 8v because of the wrong flywheel.

 

do you have a sensor on top of the gearbox, next to the engine block?

if yes, thats your CAS, it needs a teethed flywheel to trigger.

[dino20vt 3]

are you running this engine with the electronics the mi16 was running with?

mi16 is normally motronic (147ps) and this ecu/wiring loom is unable to run the 128ps 8v because of the wrong flywheel.

 

do you have a sensor on top of the gearbox, next to the engine block?

if yes, thats your CAS, it needs a teethed flywheel to trigger.

 

 

Its an 8v block with a 8v loom fitted into a 205 that did have an mi6 engine and loom fitted to it.

[dcc 855]

have you got your tachemetric relay refitted?

[dino20vt 3]

have you got your tachemetric relay refitted?

 

Yea refitted and ive got a spare too.

[sub205 5]

Its an 8v block with a 8v loom fitted into a 205 that did have an mi6 engine and loom fitted to it.

count the rows of your ecu. if its 3 row and has "motronic" labeled on top of it, remove your crankshaftsensor on top of your gearbox and look inside if there is more than just the starter-ring. if there is nothing but the starter ring, your car will never run with this combination!

 

have you checked this or are you just ignoring the facts i told you? ;-)

 

when the engine and the loom are from the same car it should run of course. but if not the chance is high that i will not run because of this.

Edited August 16, 2009 by sub205

[dino20vt 3]

All sorted, 32a yellow and 2a on the bigger brown plug were both in pin 9 on the engine side but the car side had nothing in it as it was used elsewhere when the car was 16v. So I took the red from another car then traced where it plugged into the fuse board and put the other end back into pin 9 in the plug. Started straight the away although a little noisey as it only has the manifold for a silencer!

[dcc 855]

Good news!

 

Why the change back to 8v then?

[Paul_13 212 1 Cars]

Fuel pump relay?

 

Mine was obsolete when I put the GTI6 engine in.