car starting issues
03-18-2009, 05:49 AM
#1
On The Tree
Thread Starter
iTrader: (1)
Join Date: Oct 2006
Location: Waxahachie, TX
Posts: 104
Likes: 0
Received 0 Likes
on
0 Posts
car starting issues I have a 5-6K miles on my msd opti and coil. 7k miles on tune up. 1 o2 is brand new the other has 7k miles on it. new air filter, cleaned the maf, pulled and clean the tb.
Well the car will start right off sometimes. Other times it'll drain the battery and never start and will backfire through the intake. Other times it'll start byut after cranking on it till the battery is nearly dead.
I had a buddy say he thought it was the maf but I doubt that? These cars will run with the maf unplugged won't they? It just resorts to a standard table in the pcm doesn't it? Is there a way to test the maf?
He said it could be the ICM also? Can that be tested?
Well the car will start right off sometimes. Other times it'll drain the battery and never start and will backfire through the intake. Other times it'll start byut after cranking on it till the battery is nearly dead.
I had a buddy say he thought it was the maf but I doubt that? These cars will run with the maf unplugged won't they? It just resorts to a standard table in the pcm doesn't it? Is there a way to test the maf?
He said it could be the ICM also? Can that be tested?
03-18-2009, 05:56 AM
#2
On The Tree
Thread Starter
iTrader: (1)
Join Date: Oct 2006
Location: Waxahachie, TX
Posts: 104
Likes: 0
Received 0 Likes
on
0 Posts
Oh The car will not run for **** without the msd6a hooked up.
Also Once the car is started and running for a couple minutes it runs great and it will fire on demand until it gets overnight cold. Spark seems to be jumping around and may not be firing properly. Which explains why sometimes it'll get lucky and start.
Fuel pressure also has checked out and there is no major leak down in the fp over nite. Car still has about 10psi of fp overnite.
Also Once the car is started and running for a couple minutes it runs great and it will fire on demand until it gets overnight cold. Spark seems to be jumping around and may not be firing properly. Which explains why sometimes it'll get lucky and start.
Fuel pressure also has checked out and there is no major leak down in the fp over nite. Car still has about 10psi of fp overnite.
03-18-2009, 10:38 AM
#3
I was going to say fuel pressure, but you said you already checked that.
There is a real problem if you can't get your car to run without the 6AL. That shouldn't be required. I would investigate your ignition system thoroughly. I would try to get it to stock (no box) and troubleshoot the problem.
There is a real problem if you can't get your car to run without the 6AL. That shouldn't be required. I would investigate your ignition system thoroughly. I would try to get it to stock (no box) and troubleshoot the problem.