Ok guys this one has me overwhelmed, I will describe it the best I can.
This problem only comes up when the air temp is under 40 degrees F, at that point it will take a second for my system to energize, at 0 degrees F it will take a couple minutes to energize. The truck runs great when its warm outside.
When I turn the key to the run position, the lights on my instrument cluster do the normal cycle when warm outside, the maint reqd and CEL come on, then go out and the truck starts and runs normal. When the temps drop, I turn the key on and it takes from a few seconds to a few minutes for the maint light to start to illuminate along with a drum-roll speed clicking from my ASD relay. The maint required light flickers at the same speed as the relay click. Eventually the relay stops clicking(and maint light stops flickering), my CEL illuminates for the test circuit and goes out normally at that time along with the maint light.. and the truck will start and run at that point. If I try to start it before the light cycles complete when key turned on I have a no spark condition(and probably not fuel pump). It will start once the lights go out. It runs great immediately when warm out, it will sputter and miss and die when cold out a couple times until it finally fully gets the juices flowing(it will miss pretty bad for a few seconds) and it will run decent from that point on, but still not as good as when its warm outside.
Te vehicle usually doesnt stall when running, but did stall once on the freeway after driving 2 hours the other day, but it did restart about 15 seconds after.
Its obvious I have an electrical issue somewhere. I have made some recent electrical repairs including the ignition switch, and many repairs to the main engine harness at the relay box under the hood going from the bumper to the firewall on the drivers fender. The grounds in the harness were melted and i replaced or repaired all wires that were effected by it. The trucks performance did improve and runs great if its over 40 degrees. I looked pretty hard and fairly certain the meltdown did not go beyond the area I repaired.
I havent got any codes except a 14 when I tried to start the truck before the light cycle which is a map sensor code. The map sensor is reading 4.56V on the supply side and seems to be reading in the right range when the vehicle is running according to the info I looked up. The truck since has not given new codes or the 14(MAP sensor).
The issue seems obvious to me its in the ASD relay circuit with the relay clicking away when i turn the key on until the circuit finaly energizes. I cant find a manual locally with a reasonable diagram, or a wiring diagram online to see whats in this circuit to narrow my search of endless wire harnesses which isnt helping the cause.
I have a serious squirrel issue here.. little suckers are like gremlins(I swear its a conspiracy).. they have a tendency to sabotage my vehicles at random intervals. They chewed the wire harness and plug at my fuel pump and the vent line about a month ago(tried to blow me up?), and there were acorns left in a little pocket behind the wire harness under my relay box to they are a suspect in that meltdown too... It could be possible one of these previous repairs have an intermittent connection causing the problem?
Any suggestions or shortcuts I can take to narrow down my search would be greatly appreciated. Even if it comes down to my ECM being damaged it will be dealt with, but not until im certain the circuits are working properly... but id hate to replace the ECM to soon find out I had a bad ground by the VSS or something stupid that was the entire issue.
Happy Holidays guys.
This problem only comes up when the air temp is under 40 degrees F, at that point it will take a second for my system to energize, at 0 degrees F it will take a couple minutes to energize. The truck runs great when its warm outside.
When I turn the key to the run position, the lights on my instrument cluster do the normal cycle when warm outside, the maint reqd and CEL come on, then go out and the truck starts and runs normal. When the temps drop, I turn the key on and it takes from a few seconds to a few minutes for the maint light to start to illuminate along with a drum-roll speed clicking from my ASD relay. The maint required light flickers at the same speed as the relay click. Eventually the relay stops clicking(and maint light stops flickering), my CEL illuminates for the test circuit and goes out normally at that time along with the maint light.. and the truck will start and run at that point. If I try to start it before the light cycles complete when key turned on I have a no spark condition(and probably not fuel pump). It will start once the lights go out. It runs great immediately when warm out, it will sputter and miss and die when cold out a couple times until it finally fully gets the juices flowing(it will miss pretty bad for a few seconds) and it will run decent from that point on, but still not as good as when its warm outside.
Te vehicle usually doesnt stall when running, but did stall once on the freeway after driving 2 hours the other day, but it did restart about 15 seconds after.
Its obvious I have an electrical issue somewhere. I have made some recent electrical repairs including the ignition switch, and many repairs to the main engine harness at the relay box under the hood going from the bumper to the firewall on the drivers fender. The grounds in the harness were melted and i replaced or repaired all wires that were effected by it. The trucks performance did improve and runs great if its over 40 degrees. I looked pretty hard and fairly certain the meltdown did not go beyond the area I repaired.
I havent got any codes except a 14 when I tried to start the truck before the light cycle which is a map sensor code. The map sensor is reading 4.56V on the supply side and seems to be reading in the right range when the vehicle is running according to the info I looked up. The truck since has not given new codes or the 14(MAP sensor).
The issue seems obvious to me its in the ASD relay circuit with the relay clicking away when i turn the key on until the circuit finaly energizes. I cant find a manual locally with a reasonable diagram, or a wiring diagram online to see whats in this circuit to narrow my search of endless wire harnesses which isnt helping the cause.
I have a serious squirrel issue here.. little suckers are like gremlins(I swear its a conspiracy).. they have a tendency to sabotage my vehicles at random intervals. They chewed the wire harness and plug at my fuel pump and the vent line about a month ago(tried to blow me up?), and there were acorns left in a little pocket behind the wire harness under my relay box to they are a suspect in that meltdown too... It could be possible one of these previous repairs have an intermittent connection causing the problem?
Any suggestions or shortcuts I can take to narrow down my search would be greatly appreciated. Even if it comes down to my ECM being damaged it will be dealt with, but not until im certain the circuits are working properly... but id hate to replace the ECM to soon find out I had a bad ground by the VSS or something stupid that was the entire issue.
Happy Holidays guys.