Jmanwork

Sounds like I might need a pressure gauge then

mmmjesse

i asked a dumb question so i edited the post.

Jmanwork

Lol it's all good I saw it on my email
​​​​Do you guys really think my fuel pump really have enough enough pressure to run fine though then just not start the car without any signs of failure?

HHammerly

iTrader: (3)

Just trying to cover all the possible senarios, fuel compression spark at the right time, take one out and the car will not run,.
just thinking back when my nephew swapped motors his engine would not run, he checked everithing like you are doing and ended up putting a new set of plugs and the car started right up, he may have it in one of his treads btabor look it up if you have some time or pm him

Jmanwork

It appears to be some sort of intermittent spark issue possibly? Now when I go into test mode my spark plug only sparks for 1 second then stops. I tried my old coil pack, still no luck. I'm pretty sure it's not the fuel pump after using carb cleaner to try to get the car started

Jmanwork

Okay everyone, after tons of testing and troubleshooting it's a spark issue not a fuel issue. I have intermittent spark and I traced it to the black/white wire on the coil harness. For anyone wondering it's seen on this diagram page 8 pin 2I.

http://neomiata.com/garage/Wiring%20Diagrams/Wiring%20Diagrams%201990-1996/1995_Miata%20System%20Wiring%20Diagrams.pdf

I got my car to run perfectly by running a wire from this pin to a ground on my car. However, if you look at the diagram you'll see that this ground also runs to the tach gauge. Consequently, by only running a wire to my chassis I don't have a tach on my dash.

​​​​​​the issue I am now dealing with now is I can't find where the break in my ground is to get back my coil ground and my tach ground. I understand according to the diagram they ground under the brake master cylinder but I already checked and cleaned this connection. I think my loose connection is somewhere under the dash.
​​​​
I have the dash out of my car right now, does anyone know where to check for this ground connection?

Jmanwork

For anyone reading this I'm a idiot. I read this wrong and I tore my dash apart and put it back together for nothing.

Check the simple stuff first, Fab9 screwed me. After putting everything back together my car still wouldn't run with intermittent spark. After switching with a stock coil pack, and the original spark plugs my car fired right up......

After only 400 miles my Fab9 cops are somehow done? I mounted their driver to the firewall and followed every set of instructions but no use. After reading people's advice I know I shouldn't of bought Fab9 cops. My engine revs better and seems much more responsive with the STOCK coil pack.

I was just trying to go for a plug and play option but after diving into the wiring it's pretty simple. Either follow the guides on here for Toyota cops or the gm cops it looks like. Or heck, stick with stock over Fab9 coils. I'm not sure what my neck step is, I hope Fab9 will work with me.

Jmanwork

Update: AGAIN, my miata is dead. I was driving down the road when suddenly the car just died. Luckily it was just down the road from my house so I flat towed it home (with a mini van.) However, now it won't start again. I'm pretty sure its spark again. I'm sad, I rove my 1990 short nose crank that was beat up for 6 months no problems. Now I can't even drive this thing a block down the street without it breaking. :'( :'( :'(

shuiend

iTrader: (24)

What ecu? Is it getting fuel? Is it getting spark?

I see Fab9 coils. I would get rid of them and do an LS swap if not on the stock ecu. If on the stock ecu then go back to stock coils.

Jmanwork

I'm running a MS labs ms2 ecu, i have fuel, spark is the problem.. again. Switched out to a stock coil pack, still nothing. Sounds like only 1 cylinder is firing intermittently.

I realize now fab 9 cops suck after having a lot of problems, but after emailing them it looks like I'm not going to get my money back and I don't have the money to switch to LS coils even though that's what I want to do right now.

HHammerly

iTrader: (3)

Are you loging whenever it runs? It may help you see what is dropping off when it dies

Jmanwork

I was just not the exact time when it died. As of now I can't get it to run. What should I be looking for in the log now while its cranking? I'm not sure if its possible to see spark signal?

Jmanwork

To narrow this baby down I plugged in each spark to each cop and grounded it in the exhaust manifold. However, I only have spark on two plugs? What the heck.

Reverant

iTrader: (10)

Are you running wasted spark or coil on plug? Which plugs are sparking and which aren't?

Jmanwork

Wasted spark, also tried using a stock coil pack with the same results. It appears 1/3 are firing and 2/4 aren't.

Jmanwork

Running the stock coil pack, switched out the CAS, no change. What the heck is this though?

HHammerly

iTrader: (3)

It is triyng to run on one or two cilinders not sure qhat the error is on the afr gauge, you can probably google that for that model and find out, you probably have some wires crossed out when you re did the engine wiring

shuiend

iTrader: (24)

Check your timing belt.

Jmanwork

The afr gauge is just heating up. The wiring is fine I think, the car ran fine for a good week then randomly died while driving. Now it's doing this

Jmanwork

Maybe I jumped a tooth?