Cold temp. starting issue
#31
11-04-2008, 01:37 PM
RE: Cold temp. starting issue
ORIGINAL: swartlkk
Yes, the IAC valve is in the throttle body. It can be removed without removing the throttle body, but it can prove to be quite challenging to get the lower bolt (regular torx bit) back in. You will definitely want to magnetize the bit so that the bolt will stay on it.
Yes, the IAC valve is in the throttle body. It can be removed without removing the throttle body, but it can prove to be quite challenging to get the lower bolt (regular torx bit) back in. You will definitely want to magnetize the bit so that the bolt will stay on it.
#33
11-05-2008, 07:40 AM
RE: Cold temp. starting issue
Okay... i plugged in the block heater last night and this morning it fired up like it was 30 deg in the middle of summer! That confirms my temp suspicion. So my question... what does the block heater heat up... the temp guage inside read warm so i imagine the coolant and thus ect reads warmer... would the iat read warmer too?
#34
11-08-2008, 07:25 AM
RE: Cold temp. starting issue
I was having the same issues, replaced everything including battery. Seemed like electrics was the issue because when I left the charger on it or jumped it with another vehicle it would start. Found the following page, check the symptoms section:
http://www.2carpros.com/forum/1996-c...-vt174360.html
Those were my exact symptoms. Did the fuel pump and tank job yesterdayand fired up first time this morning after sitting all night.
http://www.2carpros.com/forum/1996-c...-vt174360.html
Those were my exact symptoms. Did the fuel pump and tank job yesterdayand fired up first time this morning after sitting all night.
#35
11-12-2008, 08:02 AM
RE: Cold temp. starting issue
ORIGINAL: scorpdad
I was having the same issues, replaced everything including battery. Seemed like electrics was the issue because when I left the charger on it or jumped it with another vehicle it would start. Found the following page, check the symptoms section:
http://www.2carpros.com/forum/1996-c...-vt174360.html
Those were my exact symptoms. Did the fuel pump and tank job yesterdayand fired up first time this morning after sitting all night.
I was having the same issues, replaced everything including battery. Seemed like electrics was the issue because when I left the charger on it or jumped it with another vehicle it would start. Found the following page, check the symptoms section:
http://www.2carpros.com/forum/1996-c...-vt174360.html
Those were my exact symptoms. Did the fuel pump and tank job yesterdayand fired up first time this morning after sitting all night.
UPdate
forgive my explanation), but my initial timing was -8deg so i had the dist hold down ground so the dist could be adjusted. It's now -1 and the correct re-learning was done. Unfortunately this didn't help my startup problem. We also checked out the IAC valve... he could open and close it with the scanner..and on a cold morning when it was acting up I held the pedal at various positions to no effect. The only thing thatworks is the block heater.
#36
11-12-2008, 12:24 PM
RE: Cold temp. starting issue
Have you ran any injector cleaner through this truck? Overdose it to really get a good cleaning action. I would use two 20gallon treatments of Chevron Techron Fuel Injector Cleaner Plus. The reason why I say this now is that I experienced a very similar thing with my parents car when we parked it outside one night when it was below zero (-15*F) without the windchill and the wind was howling. Ended up that the injectors were sticking due to the cold. We solved it with a simple drop light (60w bulb) placed on top of the engine with a blanket over it. Ran some injector cleaner through it and the problem went away.
Food for thought. These injectors used in these engines are known for buildup.
Food for thought. These injectors used in these engines are known for buildup.
#37
11-12-2008, 12:32 PM
RE: Cold temp. starting issue
ORIGINAL: swartlkk
Have you ran any injector cleaner through this truck? Overdose it to really get a good cleaning action. I would use two 20gallon treatments of Chevron Techron Fuel Injector Cleaner Plus. The reason why I say this now is that I experienced a very similar thing with my parents car when we parked it outside one night when it was below zero (-15*F) without the windchill and the wind was howling. Ended up that the injectors were sticking due to the cold. We solved it with a simple drop light (60w bulb) placed on top of the engine with a blanket over it. Ran some injector cleaner through it and the problem went away.
Food for thought. These injectors used in these engines are known for buildup.
Have you ran any injector cleaner through this truck? Overdose it to really get a good cleaning action. I would use two 20gallon treatments of Chevron Techron Fuel Injector Cleaner Plus. The reason why I say this now is that I experienced a very similar thing with my parents car when we parked it outside one night when it was below zero (-15*F) without the windchill and the wind was howling. Ended up that the injectors were sticking due to the cold. We solved it with a simple drop light (60w bulb) placed on top of the engine with a blanket over it. Ran some injector cleaner through it and the problem went away.
Food for thought. These injectors used in these engines are known for buildup.
Not sure how available the chevron with techron is in canada?? I can try to overdose it. I'm not 100% clear on your fix for your parents car...you used the drop light once and then with the cleaner the problem went away?
To tie this to my block heater angle... would running the block heater overnight heat up the injectors a bit? If they would be heated up then i can see this as a possibility.
Keep in mind also that the outside temp only need be 5degrees above celcius(at time of startup attempt)for the cold starting problem to occur... sub zero temps are not necessary.
#38
11-12-2008, 01:07 PM
RE: Cold temp. starting issue
On my parents car, the heat of the drop light was enough to warm the injectors, allowing them to properly open and close.
Your problem sounds eerily similar which is why I brought that up. Yours just may be that they are gummed up to the point where even 5*C temps cause them to not want to open. You have to remember, you need to open two valves with the fuel injection system on these trucks. #1 is the electronic injector. #2 is the pressure actuated poppet nozzle on the other end of the tube, fixed into a bore on the lower intake manifold.
Your problem sounds eerily similar which is why I brought that up. Yours just may be that they are gummed up to the point where even 5*C temps cause them to not want to open. You have to remember, you need to open two valves with the fuel injection system on these trucks. #1 is the electronic injector. #2 is the pressure actuated poppet nozzle on the other end of the tube, fixed into a bore on the lower intake manifold.
#39
11-12-2008, 01:10 PM
RE: Cold temp. starting issue
Alright, i'll give that a shot... assuming I cannot find the chevron ... are there other brands that are better or worse than others? Or should I be able to get the chevron in southern ontario?