Car won't start after head

[L0ckett]

So I blew the head on my car about 3 months ago. It's been at the shop ever since. They finally got the head swapped but the can't get the car to start now. I'm not too sure what the deal is and hopefully you can help. Here are some details:

- Has a 6 bolt block and HAD a 7 bolt head that blew
- Was replaced with a 6 bolt head
- Mechanic said it's getting fuel and spark
- Compression is good (although he didn't give me the numbers)
- Said there was a "funny sound" when cranking (no description of the sound)
- Said starter was putting out near 550 amps
- Said he lined up the timing marks (didn't mention valve or ignition timing)

Now I personally don't remember if the replacement head I bought came with the correct CAS for the 6 bolt. Does that sound like the main issues if I indeed don't have the proper CAS? What else could cause this?

 

[gofer]

It might not matter but what mechanic do you have diagnosing your no start? In that situation I would check the wiring to the 1g CAS coming from the 2g CAS & CPS wiring harness, verify its correct.

When you pull a head you unplug A LOT, you might chase wires and make sure everything got plugged in too. How did he check fuel/spark/timing? Thats why I do it myself, who knows if he's saying one thing just to get more labor cost out of you.

Good luck.

 

[GSXSixteenG]

I think you may have answered your own questions. You might want to verify he has a 1g cas and it is wired properly. If it has fuel and spark, it should start unless you have no compression. So if you have compression, its either timing is off (wrong cas could definitely be the problem here), weak spark, or too much fuel (injector stuck open, I had this problem before).

 

[L0ckett]

I'm really hoping that it's as simple as a wrong CAS. He told me that it does have spark/fuel/compression but I still don't understand the "funny sound" when cranking. He was saying that the output of the starter seemed abnormally high. Does around 550 amps sound about normal or is it high? I've personally never had to measure one output.

 

[92AWDHX40]

Funny sound, seems like, he doesnt really know, anyone else you may know of. Check compression for yourself, its easy, then you can for sure rule that out.

 

[L0ckett]

Update: so I looked at pictures of my motor (since it's been months I don't even remember what it looks like in person ) and the car does in fact have the 1g CAS. I spoke to the mechanic working on the car and told him that it's not the sensor like I had originally thought. I told him to check the plug wires to make sure they were right and I even told him the order (on the valve cover - 4 3 2 1, coil pack - 4 1 2 3 correct
?) and he insisted that I was wrong and that the firing order is the same as every other 4 cylinder car. He also told me that there are 2 sensors on the BACK of the head and that one of them was the cam sensor. I don't know too much about what sensor is where on these cars so which sensors are on the back of head? He also said that it is indeed getting fuel because he can smell raw fuel when trying to crank it over, said it is getting spark, and when the car cranks (very slow cranks he says) that the compression is reading between 125 and 130 psi in the cylinders. He also insists that the timing is dead on and perfect. Can anybody offer any other ideas so I can get this car back on the road?

 

[gofer]

There are no sensors located "IN" the back of the head and if your paying this guy to fix your car he shouldn't be the one asking you for ideas... Theres a knock sensor in the back of the block under the intake manifold and the connector mounts on the back of the head? Shoot this link to your mechanic, is dummy proof... 2g Engine Bay Virtual Tour. I'm not trying to say he's an idiot but he might not have been your best candidate to work on your DSM.

Since your running a '95 ECU with a non '95 CAS your plug wires should be routed like the illustration below on the right. If the firing order was incorrect it would just turn over and backfire, ask me how I know.

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Have the mechanic check the 1g CAS wiring coming from the CAS/CPS harness using this schematic. This is the wiring that NEEDS to be done to your 1g CAS in a '95 DSM. 2g's use a CPS & CAS to give the ECU the timing signals it needs to produce a spark, 1g's only use the CAS. Thats why when you wire in a 1g CAS you also need to wire in the 2g CPS (cam position sensor) harness as well so the ECU can still get that signal. Have that retard *cough* mechanic check the wiring, sometimes when you start pulling off connectors to remove the head I know that from personal experience you'll pull loose wiring from spliced wires etc. and spend days trying to figure out W.T.F. happened.

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Once both the above checks are made you can then eliminate the possibility somethings wired wrong and start checking parts to see if somethings gone bad. It's possible the ignition power transistor took a crap, Ignition Power Transistor Location if your not sure where its at.

Because of the inverted cam signal, injector trigger wires will also need to be switch on cars using a '95 ECU with this wiring diagram in order to bring the signals back into phase. This WILL NOT cause the no start but your car will idle a lot smoother and won't get the typical "Random Cylinder Misfire" CEL once done.

Use this 2g ECU harness for the pinouts. To press the pins out of the connector you'll need a tiny jewelers because there is a plastic lock holding it in place.

Green: Pin 1 is now 14
Green w/ yellow stripe: Pin 2, is now Pin 1
Green w/ red stripe: Pin 15, is now Pin 2
Yellow w/ black stripe: Pin 14 is now Pin 15

 

[KadieTSi]

i'd say double check for yourself the timing...

 

[L0ckett]

Gofer, you are the man! Thanks for the info and I'll make sure to send him the link. He really isn't the best one to be working on my car as he's told me he has never worked on a dsm nor does he know anything about them. This is actually the second shop the car has been to. It started at my uncle's shop but due to some health reasons the car got towed to this shop so it could actually get worked on. This guy has told me almost everytime I talk to him that my car is a "piece of sh!t" and thinks the car is like every other 4 cylinder.

 

[gofer]

Thanks, I try to help when I can and btw my names Corey not gofer.

 

[Afroclipse]

TDC the car, remove CAS and spin by hand to see if she fires all 4 injectors and spark.

 

[Hughes]

Corey (edited from Gofer),
That was some awesome info ps.