100kw -> KE70 wiring, Bitch won't fire...<SOLVED>

[Rex_Kelway]

Hello sexy ladies,

Rex: Rex seems to have aproblem with His 100kw 4AGE into KE70 conversion...He believes it may be a wiring drama...

All of Toymods: SEARCH SEARCH SEARCH!!!

Rex: For many hours He has searched, to no avail. So ye shall hark upon his situation...

Rex has managed to get the entire system powered up as it should be according to the diagrams and pinouts He has:
- Injectors
- Sensors (MAP and TPS)
- Fuel pumps
- Ignitor
- Coil
- ECU (B, B1 and Batt pins)

He is using one 5 pin 30A relay to switch the Black/Orange (Injectors, Ignitor, coil etc) and the Black/Red wires (ECU, circuit opening relay etc) from the ignition position on the switch.

The cold start injector even works because the back of the butterfly is wet with fuel.

He has checked that the loom is earthed where needed and the sensors are all earthed to their two pins on the ECU. The starter signal and neutral switch have both been connected

The car cranks, the fuel pumps pump, but it appears there is no injection or spark.

It seems that the rest of the loom is pretty much internally connected (IE sensors to ECU, ECU to injectors etc) so no further external connections are needed. But he may be wrong...

In the interest of learning, Rex is seeking your assistance with what to look for in regards to making sure that the main sparking/squirting components are doing their jobs. IE Testing the injectore are getting a pulse. Then testing each item in the ignition system down to the sparkplugs. He has a multimeter and test-light.

Perhaps you may be able to assist with what Rex is actually testing for?

Even if you can point Him towards some more detailed explanations/drawings of the particular systems.


Many appologies for being a Jerk...

[mrshin]

Does the fuel pump operate as it should? I.E. is the ECU getting trigger pulses, or is this where the problem is?

[The Real Roadrunner]

is the igniter earthed correctly? coil has power?

i think there may be some seperate circuit for power but not 100% sure on it.

cheers
linden

[wilbo666]

Rex has of course hooked up the ignition switch to the ECU?

It sounds to me like the ECU doesn't think that the engine is turning over (But that goes against the cold start injector working...)...no spark and no injection -> makes me think no rpm signal to ECU...

Cheers
Wilbo

[The Real Roadrunner]

me thinks wilbo is onto something!!! could be a crank signal prob.

if the pumps trigger then hes probly got the start sig hooked up.

cheers
linden

[thechuckster]

does the ECU provide a tacho out signal during cranking?

has rex checked the various pin-outs in the diagnostic port? to see if signals are being received at the ECU?

[bobob]

Some good ideas on what to check for missing spark above.

Check from coil to diz, hold the main lead near earth and crank, if you dont see a spark then try a differnet coil or ignitor?


Have you removed a sparkplug from engine, earthed the body of plug and cranked motor to see the spark?

If you dont see a spark, start following wires...

Easist to eleimate is fuel..

- Unplug fuel return, check for proper flow
- You should be able to hear the injectors clicking, use a screwdriver as stehascope.
- Get a can of aerostart / start in a can, pull the air filter off and spray while cranking down in there... it will run if you spray consistently

The fact that it does not run for a second but there is fuel from cold start points to spark...

Where did the motor come from? Was it running? Dizzy changes??

[The Witzl]

are your IGt and IGf wires correctly wired?
are the NE, G1 and G2 wires from the dissy correctly wired, and shielded from the dissy to the ECU.

Perhaps Rex should be checking these areas. Rex should start from the electrical generation of the spark signal to the spark plugs themselves to identify the problem.

Witzl also recommends start-ya-bastard.

[thechuckster]

no recommendation for flayling the passenger front guard with hammer and/or 22mm ring spanner for above-mentioned refusal to start?

[30psi 4agte]

Has rex wired the ECU to the correct side of the ignition barrel ?

IE: On some/ older style ignition barrels You can wire the ecu to a pin that only has power on crank and when the key comes off of crank to its normal " on position " there is no power and everything dies.

It will sound all good while cranking but as soon as you come off crank..no go

Might be something to check.

[Matt-AE86]

are your IGt and IGf wires correctly wired?
are the NE, G1 and G2 wires from the dissy correctly wired, and shielded from the dissy to the ECU.

Perhaps Rex should be checking these areas. Rex should start from the electrical generation of the spark signal to the spark plugs themselves to identify the problem.

Witzl also recommends start-ya-bastard.

Matt also recommends start ya bastard. When Matt fired up his first 4AGE, It was playing funny buggers like Rex. Matt sprayed the start ya bastarded in, fired it a few times like this, then connected power to the pump and fired it again with Start ya bastard and he started. Matt had spark though, it seemed the injectors were a bit clogged for matt.

Rex should follow Witzls lead as these are the things that Matt was thinking also.

[MRMOPARMAN]

rex should check the easy stuff first..

1. get an old spark plug thats known to work, disconnect the coil lead and put said spark plug in. leave it sitting on somewhere earthed (ie engine or body etc) and crank over. if theres spark then thats ok. repeat with an ignition lead.

2. rex should grab the test light, and an opened up paper clip. disconnect an injector plug and connect the test light and paper clip to each pin. turn engine over. if test light doesnt light up (its much easier to see with an L.E.D. test light) swap the testlight on the pins and repeat

3. check to make sure the distributer and cams are actually spinning (ie no stripped dissy gear/timing belt, and check for compression, cam and ignition timing.

4. do a wiggle test of all wiring and plugs while rex or a mate is cranking. recently MRMOPARMAN had the exact same problem with his 4age ke25, turned out to be an opened up ignitor pin in the ecu, which i found while wiggling the centre ecu plug while cranking. gave the exact symptoms rex has said.

tell us what rex finds in regards to the above as which ever one is not working will lead rex in a different diagnostic direction.

[Rex_Kelway]

Hi Lads,

Rex just got inside from poking around. THE BITCH RUNS!!!

The problem as it turns out was an inferior (read: none) earth for the ignitor. It earths through the chassis of the unit, but for some reason it was left hanging...Luckily this is the first thing He tested as it didn't look quite right.

Once earthed, the thing fired first flick of the key.

Much thanks again, rep being distributed!