1990 Grand Marquis 5.0 EFI motor - need input. - Page 3

QWKSNKE · 06-10-2007, 03:45 PM

I think he is going to use his mustang harness Clint

86GT · 06-12-2007, 01:33 AM

If he plans on going the chip route then all that is needed is to change the firing order in the tune.

If the chip is not going to be done then the same harnes can be used but the pins on the salt and pepper connectors will have to be rewired. I do NOT think that just slapping on a mustang harness will do it. I believe the inputs to the EEC are in the same place.

Edit:
I just looked up the EEC pins and both use the same pins for the injectors. All that is needed, is to match the firing order with the injector outputs of the processor. You can either change the pins at the EEC or at the salt and pepper connectors. I would do it at the salt and pepper connectors.

QWKSNKE · 06-12-2007, 05:00 AM

Quote:

Originally Posted by 86GT

If he plans on going the chip route then all that is needed is to change the firing order in the tune.

If the chip is not going to be done then the same harnes can be used but the pins on the salt and pepper connectors will have to be rewired. I do NOT think that just slapping on a mustang harness will do it. I believe the inputs to the EEC are in the same place.

Edit:
I just looked up the EEC pins and both use the same pins for the injectors. All that is needed, is to match the firing order with the injector outputs of the processor. You can either change the pins at the EEC or at the salt and pepper connectors. I would do it at the salt and pepper connectors.

Unless I am missing something, he is buying an engine from a grand marquis to put in his mustang. So, other than a cam swap and turning the intake around (if he doesn't use his stock mustang intake) there is nothing else that has to be done. Unless he is getting the motor from a genrous salvage yard, he won't get the wiring harness anyhow

86GT · 06-12-2007, 11:09 AM

Yes you are right, If he puts a new HO cam in the Marquis motor and turns the upper intake around then the firing order will match.

I thought that he was using the Marquis EEC with a HO motor. I miss read that. oops.

I read into it, My father and I did just the opposite. We used a 289 with the injection system off an A9L motor in a 1966 coupe. We did not chip the EEC therefore we had to re pin the salt and pepper connectors. This was back in 1990 when we did this.

CrazyInBlack · 06-12-2007, 12:37 PM

damn this is a lot of trouble, i hope it is bad cheap

06-10-2007, 03:45 PM	#21
QWKSNKE 3v's are slow Join Date: Dec 2004 Location: Here and There Posts: 17,152	I think he is going to use his mustang harness Clint __________________ 2009 Porsche Carrera S 2008 ///AMG C63.. Eurocharge Tune. RIP 2019 AMG GLC43..wife's 03 F250 SD.. Edge Evo, AFE Stage 1 CAI 08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's 01 Cobra vert... wife's I need a new toy

06-12-2007, 01:33 AM	#22
86GT Member Join Date: Mar 2005 Location: Sacramento California Posts: 449	If he plans on going the chip route then all that is needed is to change the firing order in the tune. If the chip is not going to be done then the same harnes can be used but the pins on the salt and pepper connectors will have to be rewired. I do NOT think that just slapping on a mustang harness will do it. I believe the inputs to the EEC are in the same place. Edit: I just looked up the EEC pins and both use the same pins for the injectors. All that is needed, is to match the firing order with the injector outputs of the processor. You can either change the pins at the EEC or at the salt and pepper connectors. I would do it at the salt and pepper connectors. __________________ EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. Last edited by 86GT; 06-12-2007 at 01:44 AM.

06-12-2007, 11:09 AM	#24
86GT Member Join Date: Mar 2005 Location: Sacramento California Posts: 449	Yes you are right, If he puts a new HO cam in the Marquis motor and turns the upper intake around then the firing order will match. I thought that he was using the Marquis EEC with a HO motor. I miss read that. oops. I read into it, My father and I did just the opposite. We used a 289 with the injection system off an A9L motor in a 1966 coupe. We did not chip the EEC therefore we had to re pin the salt and pepper connectors. This was back in 1990 when we did this. __________________ EEC Analyzer A9M, TwEECer, 306ci, 73mm C&L w Tuner Tube, Cobra Intake, 42# inj, Edelbrock 6037, E303 cam, 155 fuel pump, FPR, 70mm TB, E-Fan, 3.55 gears, Powerdyne 9psi actual 5psi...way more. Last edited by 86GT; 06-12-2007 at 11:13 AM.

06-12-2007, 12:37 PM	#25
CrazyInBlack Crusin... Join Date: Feb 2005 Location: Various Places in Middle AL Posts: 3,542	damn this is a lot of trouble, i hope it is bad cheap __________________ Liberal education has nothing to do with liberal or conservative politics. Liberal education is the simple idea of a broad and well-rounded course of study in the humanities, social sciences, sciences, and the arts. The overarching goal is to liberate the mind from ignorance and superstition.