btabor

iTrader: (3)

My car was working perfectly a few weeks ago, now it will not start. I messed with req fuel and lowered it down and then up to see if cranking pws were too rich or lean. I can crank and crank and no dice. It won't even try to start.
I pulled the spark plugs and they are almost black and wet. I let the engine ventilate for 3 hours and put the plugs back in and nothing, it will crank but it does not fire at all.

I am running rc 550 injectors, mspnp1.

sixshooter

iTrader: (12)

Are you getting spark? If not, determine why.

btabor

iTrader: (3)

Yes I have spark. I think I'm going to start over. Get the cranking pws from diyautotune and do the math for the 550 injectors

btabor

iTrader: (3)

Does anyone have a suggestion? I have spent several hours trying to start the car, changed the cranking PWs, tried using a lower Req fuel...all it does is backfire like crazy. Am I doing something wrong? How do other people start their cars in cold weather?
The plugs are soaked in gas, I take them off, dry them, use compressed air to dry the pistons, still wont start. I do have good spark....

btabor

iTrader: (3)

My coolant sensor is reading the wrong temp, it says 60F and I tested the coolant with a thermometer and it reads 42F, MAT is 42F as well.
So in other words, it should be lean, not rich..but it is backfiring

Baker99miata

iTrader: (4)

look in your cranking setting and check your TP % flood clear. I would use the flood clear option to help the car start. What is your pulse width when cranking.

btabor

iTrader: (3)

I have the flood clear set at 170adc, full throttle is 192 on my car. I don't remember the pws off the top of my head, but I attached the msq

btabor

iTrader: (3)

I changed the spark plugs and it started on the 1st crank after working on it for 2 weeks. The old spark plugs had spark...what could have happened?

Schuyler

iTrader: (1)

Did you check the gaps on the old plugs?

btabor

iTrader: (3)

The gaps were set to 0.028" buy I am running stock ignition. I left the gap on the new sparks the way they come in the box but now it backfires when cruising so I'll need to close the gaps a little or just install my cops

Matt Cramer

Most of the COP coils I've seen out there are more of a cosmetic upgrade than anything else. They may be fractionally hotter than the stock coils, but not by much.