Someone I spoke with thinks that the coils and plugs should be changed to see if that corrects the issue. Are these vulnerable to cold temperatures?
It will never start below 45 degrees. Which relay?relay possible, could be binding mechanically...any electric or or electronic component possible. is 45 the cutoff point? wont start below 45 as well?
Very wise idea, how about just a hair dryer? That won't melt anything and gets pretty warm.Break out the heat gun, stick it underneath the hood and warm up the DME/ECU. If that doesn’t work, heat up the back of the glove box with it where your fuel pump relay is, just don’t melt anything. Get an Infrared temp gauge and when it gets to 45 degrees in those spots, try and start it. Maybe there is a connection that is right on the edge of being broken. I guess I’d be trying something like that. Just go easy with the heat gun.
The battery and alternator are doing well. Still trying to determine why the vehicle won't start in the 40 degrees range.How old is your battery ? Is it AGM -- it does not like cold weather- ?? I assume your tech did check and test the battery and alternator before throwing all those parts at the car.
I hope that we both find out what is going on.Well, not to steal your thread, but I'd like to know the actual cause myself, as I am having the same problem with my car.
As I recently did some major engine work (valves, heads, timing chains and guides) I have installed a new battery-fully charged-, new alternator, new MAF, and new fuel pump. But the car does not want to start: it cranks well for about 10 seconds and then dies. And it gives no error codes..!!
Though this year we have a cold winter in my neck-of-wood , with a max daily temp of 45 degrees. So, maybe ..?..