84' auto wont start

jim ross · jim ross's Garage

After years of faithful service my 84'S will not start. i turned it off in front of friends house. tried starting minutes later and no start. she will catch for a second then die..then just turn over. If you let it sit a while itll start for a second again then die then just turn over again. I checked fuel pump relay and fuel injection relay. Even jumped pump relay..still no start...proper voltage is present in terminals. there is no voltage in fuse 13 unless fuel pump relay is jumped. should there be voltage in fuse 13 going to relay or from relay? i also check voltage to warm up regualtor..proper and it is open when cold..even took it out and lubed it. the cold start injector has NO voltage to it or the time sensor when key is on. does this only recieve power when starter is on?? im at a loss here. everything seems right. I dont have a AFm..but a mass air sensor and PSC1 signal calibrator..and that has proper voltage as well.--James

Mrmerlin · 07-30-2010, 07:08 PM

You should check the timing belt and see if the timing marks line up
Then to test,
spray a 2 second burst with ether into the intake and crank it,
if it runs for a second you have fuel issue if not then its spark or timing,

jim ross · jim ross's Garage

tried the starter fluid..it starts and runs rough till fluid is burned up then dies....

wills928 · wills928's Garage

Fuel or fire, not an expert but sounds like fuel delivery issue so far .

Mrmerlin · 07-30-2010, 07:45 PM

swap out the fuel pump relay for the horn and change the fuel pump fuse

jim ross · jim ross's Garage

Ive jumped the fuel pump relay and changed out #13 and #22 fuses. i have a new fuel pump relay coming tommorrow. perhaps the relay will solve the problem..but if it wouldnt start while jumped i dont know why it would with new relay..ill see. I just hope the PSC1 / or ECU didnt take a dump!

928 Go Go Joe · 07-31-2010, 07:02 AM

I'd also check the ignition system. I had a similar problem with my '84 Auto. After a flatbed tow back to my house, it turned out to be the coil. Good luck.

Joe B.

jim ross · jim ross's Garage

thanks..i have had that in mind..coil is relativley new, and its putting out 12 volts plus when starter is engaged..but who knows? ill try hooking up on older coil that is knoen to be good and see.-J

Mrmerlin · 07-31-2010, 07:45 AM

after a bit of searching the fuel pump relay isnt a 53 like the horn relay so swapping this wont work .

IIRC you need a 3 way jumper wire to correctly jumper the fuel pump relay.
In the mean time clean all of the battery connections,
the engine grounds,
the fuel injection grounds on the right cam cover ,
the hot post connections ,
the 14 pin connector pins above the hot post,
the fuses,
and the relays in the CE panel .
use an eraser to clean the fuses and relay pins

jim ross · jim ross's Garage

thnx Merlin! i will do all that..can you elaberate on what terminals to jump on fuel pump relay? ive been jumping the #30 to #87..thats it. i an here the pump buzzing...but perhaps im missing something?-J

jim ross · jim ross's Garage

ps--Merlin..where are the engine graounds located? i know of allthe others--IE ( efi..battery ground etc.)

stepson · 07-31-2010, 01:57 PM

Do you have sufficient fuel in you fuel tank? Just asking.

jim ross · jim ross's Garage

@ stepson..yes but very low..not low enought set off the emergency light..i added 3 gallons immedatly to check for that. That makes me wonder if perhaps some contaminents clogged the fuel pump? or in tank filter?? im running out of ideas! I know its gonna turn out to be something ubscure and electrical...