6Bolt swap 2g head no start

[talon_42o]

Car cranks will not start has a black top cas. DSM Link is installed with the non- 95-96 cas signal checked. The plug wires are switched. The car is getting spark and fuel. Timing is double checked have no idea whats wrong car has a 2g coil pack and is a 95. Replaced fuel filter injectors are newly replaced... no idea

 

[black_gst]

what cam and/or crank sensors are you using? what years?

are you using a 1G CAS or a 97+ CAS

How did is you new CAS wired up?

 

[talon_42o]

Stock 2g cams with rre harness. With black top cas from a 1g.

 

[BogusSVO]

How did you check fuel?

Did you put a pressure gauge on the fuel system?

 

[kthackst]

Even though you have non 95-96 CAS checked you still need to do the infamous plug wire swap.

That checkbox just cleans up the signal difference between an inverted cas and a non inverted cas.

 

[evil tsi]

The correct firing order is 3214

 

[talon_42o]

The car is a 95 and has link that mean you don't have to swap the injector trigger wires right ??

 

[bryanwheat]

Right, with dsmlink you just click the invert signal box and you DO NOT have to change the injector and coil wires around, leave them like they were from the factory.

 

[talon_42o]

Right, with dsmlink you just click the invert signal box and you DO NOT have to change the injector and coil wires around, leave them like they were from the factory.

So the plug wires are to stay the same order as stock 2g is. but I still check the box in link. ??

 

[snowborder714]

Yes, the non-'95/'96 box needs checked.

Follow the info in this link to make sure you have the plug wires swapped properly.
swapplugwires [ECMTuning - wiki]

 

[bryanwheat]

Yes if you have dsmlink, leave the injector and plug wires as they were from the factory and click invert cas signal.

 

[snowborder714]

Yes if you have dsmlink, leave the injector and plug wires as they were from the factory and click invert cas signal.

This is only true (in regards to the spark plug wires) if you still have the factory '95/'96 CAS, which is behind the intake cam gear.

I would never touch any of the injector electrical wires as the software does it all for you.


Note that we're talking about a 2g car here, as the 1g's are different.

 

[talon_42o]

This is confusing the car is a 95 2g and has a 6bolt block and 2g head and a 1g black top cas. The car also has link 3.0. What is the correct way to wire the plugs ????

 

[snowborder714]

The way I linked you to above.

 

[boostdawd]

This should help you out buddy.
RRE Instructions
You dont have to switch the injector trigger wires as dsm link does that for you but you do have to change the sparg plug cables to
front of engine 4321
coil pack
4
1
2
3

 

[talon_42o]

Ok so here's what I've done so far.

Changed: plug wires, spark plugs, CAS, ECU, coil pack, power transistor, injectors.
Did a compression test, intake leak test, checked cam timing, ignition timing.
Has spark on all 4 cylinders, fuel goes in all 4 cylinders, fuel pump works.

Plug wires are hooked up 3214.

 

[snowborder714]

Check if CAS is 180° out? (3/4 way down the page)
RRE Instructions

 

[talon_42o]

The CAS is synced properly, tried a different CAS as well.

Other things I've diagnosed are the camshaft and crankshaft signal wires to the ECU, ran 2 new wires right from the CAS pigtail to the ECU connector.

Also checked ALL the power supply and ground wires at the ECU harness for 12v and a good ground. I cleaned up the all the engine bay grounds and switched batteries..

ECM link shows all the sensors reading properly, even so I unplugged most of them and kept just the bare minimum to start the car to eliminate the possibility they're causing a short or some kind of interference in the ECU circuitry.

I've logged the injectors pulse during cranking at 180rpm 450cc are pulsing at around 20ms, which also tells me it's reaching cam/crank sync and if it wasn't for that I've checked timing advance via timing light and it's within spec.

Checked the physical cam/crank timing(oem cam gears) and it's spot on. I removed the valve cover and checked the valvetrain, everything's in place and the cams look like the OEM cams. (head just rebuilt at a vendor on this site and never ran yet)

Spark happens on all 4 cylinders, as well as fuel makes it into all 4. I know this since i pulled the plugs and both cylinders and spark plugs are wet with fuel(after several unsuccessful starting attempts). I played with the fuel pressure high and low and everything inbetween trying to get it to start...even used some starting fluid...nothing.

There is one odd thing I noticed with the spark on cyl 3,2. It does not have the even rhytmical spark I'm used to seeing, like on cyl 1,4. It strikes 3 times quickly then a gap. I don't think this is right and I'm trying to trace the cause of this right now. I know it's not a fault in the ECU, igniter, coil pack, CAS or signal wires to the ECU or the 2 trigger wires from the coil pack to the igniter. These parts have been changed with known good parts.

Any thoughts/suggestions? I am really running out of ideas at this point, I have over 20 hours and many battery charges put into getting this simple head swap 2G to start that was running just a couple of months ago...

 

[BogusSVO]

I know you say your time belt is correct, and all marks line up.

This is going to sound soo newb, but with the time belt set at the marks, are the cam doel pins at the 12 o' clock position?
I understand that you have prob checked the time marks 50,000 times by now, but did you ever check the dowels?

From what I have read and understood, the car should fire up.

I have set time belts in the past and gone nuts tryin to figure out why it wound not start, and looked at it for days on end, just to find out, it was something small, cam 180 out

 

[teenvette77]

I have this same problem but with a 97 converted ecu with link. Subscribed...

 

[snowborder714]

So you are running a '97 converted ECU with a 1g CAS? Your situation is different than the OP's because of the difference in ECU.

From the DSMlink wiki page on swapping plug wires I posted above:

When installing a '97 ECU that has been converted to EPROM on a car with a 1g or 2gb cam angle sensor, you would not need check the box to invert the CAS and swap plug wires, as the signals should be the same as the ECU is expecting to see. However, if you are installing it in a car with a '95/'96 cam angle sensor, you do need to check the box to invert the CAS, as well as swap the plug wires.

 

[teenvette77]

Yes, and your link helped alot. Thanks much. Im going to uncheck the non 95-96 box, keep stock wire layout and see where that takes me. Would still like to see what the OP comes up with in case it doesnt work.

 

[DSM98GSX]

Another newb question, but does your DSMLink have a known startup tune before you did the head swap?

 

[snowborder714]

Link doesn't need a "start up tune" like a standalone system would.

 

[talon_42o]

UPDATE:

Car still won't start we think it is the harness because there is a battery drain some where and the spark on 2 & 3 is still not the same as on 1 & 4. This car is cursed we have tried every possible thing on the car swapped known good parts with other known good parts Its very frustrating to deal with. Any input would be helpful weather I should part out the car or replace the harness ???