Seicento My 2.0 16v Seicento Project

[SeiSporting]

Hope its getting wheel trims and a 899 sx badge on it.

 

[Todger182]

It might be worth switching to wasted spark if you upgrade ECU. You can get rid of that coil pack then.

Allow more room for a better induction kit possibly with cold feed. Was going to mention it while i was there but it slipped my mind.

Thanks

 

[CLXCraig]

Hope its getting wheel trims and a 899 sx badge on it.

lol, that would be good, standard trim too! proper sleeper!

 

[randomizered]

It might be worth switching to wasted spark if you upgrade ECU. You can get rid of that coil pack then.

ITB's, fully sequential ignitionand injection ftw

 

[sei16v]

Lol i would go for ITB if i could cope with the 15mpg on the XE engine.... as i like nearer the 35mpg il keep the normal inlet set up lol...

Nightmare of a day today, sorted the clutch cable issue by using a smaller 899cc one (as advised by someone on here) and trimming my custom bracket down 10mm.

Fitted all the plumbing pipes, and fitted a new metal fuel filter internal to the car, tested the pump and everything can handle the pressure...

Im just stuck with a cr*p wiring issue now, which is confusing the hell out of me,,,, in an ideal world i need another seicento to test to compare the results, but at the min im just seriously head scratching lol

 

[randomizered]

I would say test mine, but i've gutted all my wiring.

You have the schematics now don't you?

What exactly have you done, have you left and what are you mixing together? and whats the problem?

I have work tomorrow else i'd come over and help out.

If your still struggling by monday morning, i can probs spare a few hours.

Kristian

 

[sei16v]

I would say test mine, but i've gutted all my wiring.

You have the schematics now don't you?

What exactly have you done, have you left and what are you mixing together? and whats the problem?

I have work tomorrow else i'd come over and help out.

If your still struggling by monday morning, i can probs spare a few hours.

Kristian

Ah cheers, thats nice of ya...

Well... few issues....

Seem to have the interior light on all the time, and we cant turn it off from the interior light itself (not sure if this is a problem or not, could just be the roof switch).

The wiring side of it vauxhall wise.... The engine has loads of wires, but just to start and run the engine loom we need a 12v perm, a 12v switched (ign), earths and finally the 12v feed for the fuel pump.

This is all wired up, but the engine cranks yet doesnt seem to fire...

The reason im not looking too far into the vauxhall side of things is down to the electrics giving me a wierd reading prior to me fitting the vaux wires.

It was giving me a connection between 12v+ and 12v- at the battery terminals (no battery fitted), and i was under the impression that under no circumstances should these give out a bleep on a continuity tester. We thought it was down to the interior light, as after fiddling around with the door switches sometimes the bleep between the two terminals would disappear...

If the doors are closed the problem seems to be gone, until i turn the ignition switch, then it bleeps again :S

I will be checking the wiring of the interior light tomorrow to see if this could be the route of the issue.

 

[randomizered]

you definatly have some sort of issue. Your right about continuity on the battery terminals, thats all wrong.

If it were me, i'd negate the fuel pump by manualls wiring it up to 12v just to test. Running it without the car goeing is fine, the injectors shouldn't weep at all.

If you do have a wiring gremlin, reome the interior bulb and cheack again, thats pretty easy. It will simply break the circuit. Then check for continuity on both sides of the bulb contact to the chasis with the door open and closed.

 

[sei16v]

you definatly have some sort of issue. Your right about continuity on the battery terminals, thats all wrong.

If it were me, i'd negate the fuel pump by manualls wiring it up to 12v just to test. Running it without the car goeing is fine, the injectors shouldn't weep at all.

If you do have a wiring gremlin, reome the interior bulb and cheack again, thats pretty easy. It will simply break the circuit. Then check for continuity on both sides of the bulb contact to the chasis with the door open and closed.

Think i will give it a go at temp removing all the wiring on the fiat side of things, leaving just the vauxhall stuff to see if it runs.

Ive had the fuel pump running on a 12v+ from the battery, as i cheated to get the pressure in the system before turning the car over, as we made new fuel lines... but then the car didnt turn over lol.

I need to get rid of this electrical gremlin asap me thinks...

We have tried it without the bulb, but the ignition still gives us the bleep on the test... although am i right in thinking that the wire that primes the starter motor is earthed until it has a 12v feed? Although that would only make any difference on click 3.

I checked the starter from the fiat that was working, and the prime wire was connected to earth,,,,

 

[randomizered]

If you have the sei manual, check volume 4 electirical, the power supply, pages E1010 for the key barrell, and also Engine Systems, E5010, page 4.

Should pretty much sum it up.

On the barrel side, with starter connection removed, the solenoid output at the barrell should be floating, and then when when turn to crank posistion, should short to +12V

With the starter linked up, the barrel side will short to earth all the time as it's jsut a winding coil, with no resistance, straight to earth, adn the barrel runs 12v through it, driving the coil to engage the solenoid..

 

[Kestrel]

What an Inspiration ! Keep going Bud, almost there,
Final Hundred Yard Stretch

 

[sei16v]

If you have the sei manual, check volume 4 electirical, the power supply, pages E1010 for the key barrell, and also Engine Systems, E5010, page 4.

Should pretty much sum it up.

On the barrel side, with starter connection removed, the solenoid output at the barrell should be floating, and then when when turn to crank posistion, should short to +12V

With the starter linked up, the barrel side will short to earth all the time as it's jsut a winding coil, with no resistance, straight to earth, adn the barrel runs 12v through it, driving the coil to engage the solenoid..

Ah this makes sence now, ive got the sei wiring PDF thing, which il take a good look at in the morning and see where we hve gone wrong......

appreciate the help

 

[willieboy]

your an absolute animal! but fair play to that, you work really quick! i wish i had this kindof motivation on my own cars!!

 

[sei16v]

The electrics are sorted..

The car was refusing to start, down to a duff crank sensor, and a water/rust damaged fuel relay... I was quoted nearly £80 for a relay, so i ended up taking a trip to maplins electronics to pick up two 40A 4 pin relays, and 3 diodes... 20 mins later and i had a working fuel relay... The car turned over, idled and died... (also filling the drive with smoke)

I called it a night, and took a cheeky look at the car this morning...i almost had a panic attact today when discovering water in the head when removing the spark plugs....
I immediatly thought that the head was cracked, or that the headgasket had gave up prior to me owning the engine.

I took the plugs out, and dried it all by turning the engine over, and getting an air compressor in to blast the remains out. Refitted the plugs, cranked the engine and re-removed the plugs... They came out dry although now covered in fuel lol...

The car refused to start still but there was no water present in the head... We did stupidly leave the engine out in the rain a few nights without an inlet or manifold attatched when building up the car, so i hope its just that...

We have fuel, air and spark, but the spark is very weak (yellow)... so its off to the local motor factors tomorrow morning for a new set of plugs, leads, dizzy cap and rotor arm, so we can get a nice strong blue spark...

Il keep it updated and let you know if it all works.... (i hope so as the headgasket is an engine out job, so not worth the bother....be easier just to get another engine, although the water doesnt look to be mixing in the header tank)

 

[carmadrory]

gutted for you

but with the heater box removed the rain can get in the vents just below the windscreen

inlet manifold on mine this morning was full with water

lucky its not all bolted in yet

also check your earth to your block i have found xe s that produce a week spark when they are not earthed right

and make sure your battery is full charged i have also saw xe s being cranked on a low batt and they do in the ecu and flood them selfs so much they wont go

 

[sei16v]

gutted for you

but with the heater box removed the rain can get in the vents just below the windscreen

inlet manifold on mine this morning was full with water

lucky its not all bolted in yet

also check your earth to your block i have found xe s that produce a week spark when they are not earthed right

and make sure your battery is full charged i have also saw xe s being cranked on a low batt and they do in the ecu and flood them selfs so much they wont go

Ive got 5 braided earth straps on the engine so should be enough, but il try holding a jump lead on the block tomorrow once ive fitted a few electrical bits...

The battery is charged fully (14v) so should be good enough to crank...

And yea, something needs doing with the scuttle hole lol

 

[carmadrory]

you figure out which wire for the rev counter yet?

 

[sei16v]

you figure out which wire for the rev counter yet?

Yes on the vauxhall side, but not on the fiat... have you got a heads up? lol....

Was going to use the digi dash, but it hasn't turned up yet

 

[carmadrory]

i was gonna try keep my dash standard

i have a complete diggy dash i can lend ya if ya want

in the loom vaux side its green wire from the coil

what did you end up doing with the vent from the tank?

i was gonna put a non return valve on mine and some copper pipe then straight in to my exhaust centre box lol

 

[sei16v]

i was gonna try keep my dash standard

i have a complete diggy dash i can lend ya if ya want

in the loom vaux side its green wire from the coil

what did you end up doing with the vent from the tank?

i was gonna put a non return valve on mine and some copper pipe then straight in to my exhaust centre box lol

Lol wouldnt the heat and the vent vapours be dangerous?

I was thinking of blanking off the vent pipe all together and then fit a vented fuel cap so its still vented.

I know the wiring for the revs on the vauxhall side, but not too sure what colour it is on the fiat side. Once i find out il let you know as i have the wiring diagrams for the seicento somewhere.