Ive been working on this piece of **** for almost 2 years. I have been trying to start it for the past couple days with only 2 cylinders igniting at most. Im wondering if any mo fos have any insight.

Background
Running built megasquirt hi res, 460cc injectors, LC1 wideband timing set at 10* btdc

Fuel is delivered in all 4 cylinders

I started the car 6 months ago with stock ecu and stock injectors with same symptoms.

Here's the weird thing. I'm only getting 1/2 of each coil to fire. For example, Cylinders 1 and 4 fire together, however only the left part will fire so if 1 was on the left it would spark and 4 would not. Same thing with 2+3. I can switch them also. So that 4 will fire and 1 will not.

I have spare parts that ran flawlessly on my 93 black that i started switching over:

Ignitor
Coil pack
spark plug wires
NEW spark plugs

Its something stupid i now. Ideas welcome, Jeff's coming over Saturday and were going to go over everything.

 

bad CAS? is your RPM signal making sense (cranking around 300rpm)?

 

cam angle sensor perhaps?
ECU grounds?

 

Plugs on the coil flipped?

 

poo

 

The plugs can be flipped, as long as they're on the correct coil.

For whatever reason I doubt it's the CAS, as it would either send a signal to the coils or not. I don't think it could break to the point where it's sending some signal that only fires half a coil.

If all else fails, COPs.

Hold in there, once you drive it you'll love it again.

 

Left and right doesn't matter, unless you haven't ever taken the coils off the bracket, and know all other previous owners haven't since 1990. The numbers are scribed on the back of the coil bracket though.

I have two spare sets if it ends up being a coil.

 

I swapped two different coil packs in there. I got 1 and 4 on the driver side, 2 and 3 on the passenger. All had same results.

 

Multimeter on continuity test on all 8 lines back to ECU to check and make sure they are not broke or something?

 

Sell it then do a k20 metro. Check wires from igniter? This is a 1.6 correct?

 

Yes its a 1.6, I just remembered the previous owner use to have a 1.8 in the car, could this change things?

 

Also i verified i have spark in all 4 cylinders @ the coil. So i got no idea.

 

Eh? You have spark on all 4 ports on the 2 coils, but not at the spark plug?

Plug your spark plug wires in. put your plugs in the end. Lay your plugs so the threads touch the valve cover. Open the hood and look under it while you try to start it. Which ones aren't sparking?

Be very positive when answering that question, I thought I had a spark issue when it ended up being a jammed injector. Spark is 1&4 and 2&3, where as fuel is 1&3 and 2&4.

Edit: If it truly is sparking on all four and you have fuel to all four, there are only three options:
1. wires are bad
2. wires are routed incorrectly
3. fueling issue

 

I have brand new NGKs and swapped them with ones that were known to run flawlessly and both had the same effect. Thanks, I will try this tomorrow after work.

 

It's some sort of failsafe if it only sees one of the two signals. Nick's SM had this problem after a shell swap, only running on two cylinders even through coil changes and stuff. A new CAS solved it.

 

Coolio. SK, do that with your spare CAS.

 

Ill try this after work today. Thanks fellas.

 

Update
Changed the CAS and did the method of putting all 4 plugs on the end of the spark plug wires and had someone start the car. Turns out 1 and 4 arnt firing, However when it first starts to crank they all fire for 1 cycle then only 2 and 3 fire. Changed the coil pack just to make sure and still same symptoms.

So just to reiterate, 2 and 3 fire as they should each cycle. 1 and 4 fire on the first cycle only then are dead.

 

Are you dead sure the CAS you swapped in was working as well?

 

Yezzir