so i bought a couple of used BMW injector harnesses for the Jag. the connectors are all busted and chipped. the retaining rings have all fallen off. im pretty cross with the seller right now.

the EV1 injectors from osidetiger.com are all sold out too.

this blows.

 

Bring your *** here, we will hook you up. Maybe we will unravel your fuel management enigma here, by looking at my sexy V12 run

20120404 170802 - YouTube

 

Bad news, sorry


You could get 15 of these (12 for injectors, 2 for sensors, 1 spare), some decent wres, and make up a new harness in about four hours. A soldering gun, some tape.....

Injector connector fuel pigtail Ford Chevy VW GM Buick | eBay

Cheers
DD

 

i was just thinking that.

and yes, ive watched all of your videos many times. no need to repost. lol

just bought 15.

 

M use good quality silicone insulated wire and you will never have trouble again with cracked insulation.

May I also suggest using a MIL spec connector to join the new harness to the old in the fender well.

Also document your new harness if the wire colour codes are different so if you need to do any work in the future you have a wiring diagram.

 

just bought 300 feet of crosslink 18 gauge from delcity.com

 

im looking at the injector groups here in my schematic.

1a, 3a, 5a
2a, 4a, 6a
1b, 3b, 5b
2b, 4b, 6b

is this correct? because my harness is wired

2a, 5a, 4a
1a, 3a, 6a
2b, 5b, 4b
1b, 3b, 6b

 

My schematic agrees with your schematic

Cheers
DD

 

so my injector harness has been mixed up at some point.

so i rigged up a temporary injector harness with the BMW stuff i had. no change whatsoever.

i dont think you guys understand just how rich im talking about here. it runs SO rich that i drained 5 gallons in about an hours worth of tinkering. my supercharged GP doesnt drain 5 gallons in an hour of driving.

 

The 5 and 6 injectors being swapped around means someone has had them off. At a guess 5 and 6 would most likely not have the required fuel when it goes bang. This could make the other cylinders run rich but not that rich. You obviously have more than one issue that is causing you mixture problem.

As someone has been in there tinkering I would be checking every sensor for correct connection and operation.

Check the O2 sensors, obvious as they control fuel enrichment
engine coolant temp sensor - this provides cold start enrichment
IAT sensor - this provides 2% enrichment for ever 10°C fall in IAT


There is an idle mixture adjustment in the ECU although I would only touch this as a very last resort.

 

dont all 12 injector pulse at the same rate with the same amount of fuel?

as i asked earlier, whats the best way to check these?

ive got this bridged with piece of wire to get 5v, as i have removed my air cleaners.


jamey had his XJSC running nicely with this ECU, so for the time being im not going to touch this pot.

 

No they pulse in batches and the on time is governed by inputs from the sensors. One other thing to check is Fuel pressure if this is way too high you will over fuel.

 

With a voltmeter. It's easy. Click here and scroll down.
O2 Sensor Test Information & Resetting the Light

Since yours in an '85 you should have the single wire O2 sensors. If by chance you have the 3-wire type, the signal wire (as opposed to the heater wires) is segregated from the other two




Completely off, including the housings that bolt to the throttle bodies? If so, are the bolt holes open? If so you'll have a huge vacuum leak


Cheers
DD

 

theyre single wire o2 sensors.

but after reading the whole article, its clear that o2 wouldnt effect the way the jag runs in open loop. unless....... the o2 sensors arent getting or sending any voltage at all. if the o2 reads 0 volts due to a broken wire it could cause the ECU to go full enrichment, right?....





no.

 

Hmmm.

I don't think so. I think it would just default to open loop fuel mapping. The TPS and Baro sensor are still the primary fuel metering players. The O2 sensors are more like trimming devices.

One thing.....check the oxy sensors in "Drive". At some point....can't remember the break...the system was configured to go open loop in "Park", as I recall.

Cheers
DD