Re: 4 banger trouble-shoot ....
[Re: dOc !]
#841245
10/29/10 02:10 AM
10/29/10 02:10 AM
|
Joined: Feb 2008
Posts: 163
Winnipeg, MB
sreinheimer
member
|
member
Joined: Feb 2008
Posts: 163
Winnipeg, MB
|
Auto shutdown relay (ASD) i think can cause no spark and no fuel but not 100% on that
69 Dodge Charger - first full resto
05 Dodge Magnum R/T
|
|
|
Re: 4 banger trouble-shoot ....
[Re: dOc !]
#841247
10/29/10 03:05 PM
10/29/10 03:05 PM
|
Joined: Oct 2003
Posts: 1,371
Costa Mesa, CA
chache876
pro stock
|
pro stock
Joined: Oct 2003
Posts: 1,371
Costa Mesa, CA
|
Quote:
THX ....I will have him check that. What is the purpose of that relay ?
It provides 12v to the fuel pumps, ignition coil, injectors, etc...
Basically so that it kills fuel pressure when the key is turned off to prevent fires, run on, etc...
|
|
|
Re: 4 banger trouble-shoot ....
[Re: dOc !]
#841249
10/29/10 03:29 PM
10/29/10 03:29 PM
|
Joined: Oct 2003
Posts: 1,371
Costa Mesa, CA
chache876
pro stock
|
pro stock
Joined: Oct 2003
Posts: 1,371
Costa Mesa, CA
|
I'm not 100% sure on that vehicle but they're usually on the firewall in a group of 3 relays. The haynes manual will tell you for sure.
Last edited by chache876; 10/29/10 03:29 PM.
|
|
|
Re: 4 banger trouble-shoot ....
[Re: chache876]
#841250
10/29/10 10:31 PM
10/29/10 10:31 PM
|
Joined: Jan 2003
Posts: 3,122
Auburn WA
Dave_J
master
|
master
Joined: Jan 2003
Posts: 3,122
Auburn WA
|
On the P-body cars, all three relays are between the battery and the brake booster. Its one of the three. The wiring diagram will show what wire colors to look for.
Retired, US ARMY 1973-1994
ASE mechanic, Electrical 1994-1997
Retired GTE/VERIZON/FRONTIER 1997-2015
Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.
03 Suzuki Burgman 650(Burger King) Scooter
65 Formula S Cuda
78 Little Red Express Truck
98 Buick Regal (wifes car)
|
|
|
Re: 4 banger trouble-shoot ....
[Re: Dave_J]
#841251
11/01/10 10:30 AM
11/01/10 10:30 AM
|
Joined: May 2006
Posts: 1,374
North Central Indiana
C-Tech
pro stock
|
pro stock
Joined: May 2006
Posts: 1,374
North Central Indiana
|
The pick up coil is much more likley to be bad then the ASD relay, check for power to the coil on the + side when you first turn the key on should power up for 3 seconds if you have power there the ASD is working properly. the fuel pump and coil are powered by the ASD but the computer will not turn it on if it does not see a signal from the pick up coil while cranking.
Kevin
|
|
|
Re: 4 banger trouble-shoot ....
[Re: C-Tech]
#841252
11/01/10 02:23 PM
11/01/10 02:23 PM
|
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
DaytonaTurbo
Too Many Posts
|
Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
|
Quote:
The pick up coil is much more likley to be bad then the ASD relay, check for power to the coil on the + side when you first turn the key on should power up for 3 seconds if you have power there the ASD is working properly. the fuel pump and coil are powered by the ASD but the computer will not turn it on if it does not see a signal from the pick up coil while cranking.
Incorrect. The computer will prime the fuel pump even before you start cranking. When you put the key to the run(but not crank) position you should hear the fuel pump for a few seconds. The pickup fires off the injectors and you are right in that the fuel pump will not continue to run past the 3 second prime if there's no signal from the pickup in the distributor, but it will still prime when you turn the key to run. It will only try to prime a set amount of time per start cycle but I don't remember how many times that is. Maybe 5 or 6 times if memory serves.
The older years had the ASD relay built into the ECU but by 1990 it was a seperate relay. On the cars at least it's around the drivers side strut tower area. Not sure about the minivnas.
|
|
|
Re: 4 banger trouble-shoot ....
[Re: DaytonaTurbo]
#841253
11/01/10 03:21 PM
11/01/10 03:21 PM
|
Joined: Jan 2003
Posts: 3,122
Auburn WA
Dave_J
master
|
master
Joined: Jan 2003
Posts: 3,122
Auburn WA
|
But if it does prime the fuel rail for that 3 seconds, it will do it once untill the pressure bleads down.
If it does prime and crank over but will not start, pull the disrtibator cap and see if the "rotor" rotates while cranking. If not, broken Timing belt could be the cause. VERY COMMON! Unless its a highly modified 2.2/2.5 with a high CR and high lift cam, they are a NON interferance engine and all should be ok if the belt breaks.
Retired, US ARMY 1973-1994
ASE mechanic, Electrical 1994-1997
Retired GTE/VERIZON/FRONTIER 1997-2015
Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.
03 Suzuki Burgman 650(Burger King) Scooter
65 Formula S Cuda
78 Little Red Express Truck
98 Buick Regal (wifes car)
|
|
|
Re: 4 banger trouble-shoot ....
[Re: C-Tech]
#841255
11/04/10 08:47 AM
11/04/10 08:47 AM
|
Joined: Jan 2003
Posts: 21,059
Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
|
oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,059
Niles , Ohio
|
Correct the ASD fires the pump for 3 seconds every time the key is turned on.Ive had a few also where the shutters under the pickup broke and didnt turn.You should be able to fell the relay click on when the key is turned on.As suggested check that the dist is turning as belts were a common problem with them.Ive even seen some that the teeth get torn off and they skip them catch then skip.They are easy cars to diag and work on.Also check the positive cable real close to make sure one of the wires hast broken.I also had one that a large ground on the rear of the head had broken and wouldnt start.Rocky
Chrysler Firepower
|
|
|
|
|
