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91rangerturbo
02-28-2006, 12:15 AM
Okay heres the deal. I don't know where to go next with this car. I bought it and it ran took it for a test drive and it died on me and won't start again.

I replaced the ignition module, crank sensor, coil packs, plug wires, and plugs.

I get reference from the crank and cam sensors at the module. Got it at the computer also. But while cranking no rpm signal in the data stream. And it has injector pulse but no spark.

Checked the tach wire for being shorted to ground but no problem there.

I live in southern indiana near louisville, ky. I have called autozone, advanced auto, pep boys, gm dealer. They all say special order. I purchased one through oreillys for $500.00.

Do i have any other options? Every part store in town cannot get them for me. I have never had a problem like this..

Later,
Josh

91rangerturbo
02-28-2006, 01:58 PM
What does it take to convert a 84/85 to the 86/87 ignition system

PaCemkr86
02-28-2006, 02:42 PM
i know there are several guys on here that have done it, hopefully they wil post up

91rangerturbo
02-28-2006, 02:51 PM
I would love to get this car running so i can drive it this weekend and get some baseline times for it. The track opens this weekend. :drive:

PaCemkr86
02-28-2006, 07:01 PM
try this
http://www.gnttype.org/techarea/ecmsensors/8487ecm.html

PaCemkr86
02-28-2006, 07:03 PM
and here is one to convert to the 86-87 igniton module also


http://www.gnttype.org/techarea/ignition/module.html

91rangerturbo
03-01-2006, 08:29 AM
thanks for all your help. I went with the casper electronics plug and play ignition conversion for the 84/85 to convert to 86/87 module.

Are the coil packs the same for 84/85 and 86/87?

PaCemkr86
03-01-2006, 12:42 PM
http://www.gnttype.org/techarea/partspage.html

according to this they have the same part number

91rangerturbo
03-01-2006, 01:15 PM
PaCemkr86

You have been so helpful to me. Thanks alot. I cannot wait to have this car running. Opening Track day is saturday :drive: :six:

PaCemkr86
03-01-2006, 01:56 PM
keep us posted

91rangerturbo
03-06-2006, 08:39 AM
I bought a cam sensor. Ignition module and coil packs installed it all this weekend and i still got nothing. Now i am not getting anything from the crank sensor. I will have one of those in my possesion today. Will keep you posted if i get this car running today. :ugh:

Keller
03-06-2006, 01:36 PM
according to this they have the same part number
Interesting...the OEM ones aren't. Doing the conversion is probably the best option for a driver.

Keller
03-06-2006, 01:37 PM
Insure the crank sensor is installed with the proper slot in use. If not, it will never send a signal to the ECM.

PaCemkr86
03-06-2006, 01:46 PM
Interesting...the OEM ones aren't. Doing the conversion is probably the best option for a driver.
well maybe you should check the info that on the gnttype site, cause thats where i got the info.
It clearly says the coils have the same part # 25533542

kenmosher
03-06-2006, 02:07 PM
Insure the crank sensor is installed with the proper slot in use. If not, it will never send a signal to the ECM.
More info about this here in the FAQ section:

http://www.gnttype.org/forums/showthread.php?t=4380

91rangerturbo
03-06-2006, 02:35 PM
A freind of mine had the same problem with a 87 GN. we replaced the ignition module, coils, crank and cam sensor, ecm.

It turned out to be a oil pressure switch :lite:

91rangerturbo
03-06-2006, 09:07 PM
Okay installed a new ignition module, coil pack,wires,cam sensor, crank sensor. I installed new crank sensor replaced it using the right slot. The correct slot is closest the crank sensor connector (closest to the engine)

I am not getting between 1-9 volts from pin b on the crank sensor wiring harness *while cranking* connector disconnected on the module side have between .5 and 11 volts at terminals A and B with voltmeter to ground.

Voltmeter on terminals A and C have battery voltage.. Second NEW SENSOR! Both installed properly and aligned properly.

Still no signal when reconnected.. Module connections check out ok..

Module was tested at autozone and it was tested good aswell. :mgun:

SLOW_85
03-06-2006, 10:18 PM
http://www.vortexbuicks-etc.com/
LINKS to Left:
troubleshooting
tech pictures / instructions

PaCemkr86
03-07-2006, 12:38 AM
did you check all the grounds? Doesnt pin C go to ground?

91rangerturbo
03-08-2006, 11:52 PM
Okay got the car to start after replacing the entire ignition system pretty much. Now all i need is a fuel pump. Because that quit out on me too. I get power all the way to the pump but it is not doing anything. So thats coming out.

I have searched and read for a while. But do i really need to hotwire or is it just extra insurance. Wouldn't that cause the pump to heat up?

And what pump should i get just a 255hp or a 307?

This is just a stock non-intercooled car but would like to modify it some.

SLOW_85
03-09-2006, 06:54 AM
The hot-wire insures you have a constant voltage at the pump.
Keeps from having any voltage drop under load.
The 307 would be fine or go with the 340
Actually the gas in the tank cools the pump.
Why you don't want to run it too low on fuel..
You can make your on hot-wire kit.
Some info:
http://www.racetronix.com/
If you order a hot-wire kit specify it's for a 84 Hot-Air.

http://www.gnttype.org/techarea/fuelsystem/fuelpage.html

PaCemkr86
03-09-2006, 10:28 AM
go with the walbro 340 aka 255 intake pump

91rangerturbo
03-09-2006, 10:44 AM
what is a intake pump?

I am assuming a in-tank pump is what you meant?

Is the 307 the part number and it is just a 255 fuel pump?

Okay so the 340 is just a 255 high pressure. I gotcha now. Thanks..

Keller
03-09-2006, 02:17 PM
Not sure the 307 is made any longer.

PaCemkr86
03-10-2006, 01:14 AM
sorry for the type-o
thats supposed to be
intank pump... like in the fuel tank.. sorry

91rangerturbo
03-10-2006, 08:25 AM
No problem.

I will check my schematic and find out exactly which wire was broken. And post up so it will help others in troubleshooting.