Seeking local support for a DSM project near completion!

[nix4]

I have a '95 2g GSX and am working with a local mechanic to finish up the car and prep it for a tune. My current mechanic is confused by the cam sensor and the wiring harness, and I wanted to reach out here and see if there is any local support thats willing to accept payment for time on helping either consult or work with finishing up this project. I have been trying to complete this DSM for 10+ yrs and upon arrival in New Mexico I have made little progress in 10 years due to mechanics being unable to finish this build!

The only current issues are the harness/cam sensor..and possibly the guage cluster. I have the stock cluster I was told works fine...but I haven't confirmed it yet. The harness and cam sensor is just confusion on my mechanics part (there is a green and orange plug on the engine for the cam sensor but the mechanic only sees one plug on the harness and thinks hes missing a plug on the harness, though this harness and engine haven't been seperated in years and have ran in previous tunes in the past).

Any help is appreciated

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[19Eclipse90]

Do you have pictures of said connectors? We may be able to help for free.

 

[nix4]

Sure do! I dont have hands on access to the car as its at my mechanics shop but he super responsive... below are the last images he sent me trying to figure this out. I think he just hasnt worked on these DSMs so some of it is new to him.

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[steve]

Looks like the first set on connectors in this thread. https://www.dsmtuners.com/threads/early-model-year-2g-wiring-harness-differences.434771/ and https://www.dsmtuners.com/threads/2...ical-connections.298047/page-2#post-151542263

I'm not sure but I think that makes the square one for the early 2G Cam Sensor and the triangle one for the 2G Crank Sensor. I'd double check the wire colors with the 95 FSM Electrical Diagrams to be 100%.

 

[pauleyman]

If that is actually a 95 car and it still has the original harness then it won't have a connector for the 1g cam sensor on the passenger side of the valve cover. Where does that harness go? Should go back to the drivers side by the belt cover as the 2ga cam sensor was under the intake cam. square plug in last pic. Triangle plug should be crank sensor as mentioned. car may have two triangle connectors. One is AC if the car still has it. Don't mix them up.

 

[nix4]

Awesome thank you all for the feedback, passing this along to my slightly mechanic...will post if it solves the problem!

 

[19Eclipse90]

Regarding the CAS, this is the wiring for that version of CAS (a 1G unit) when installed in a 2G car. There are adapter harnesses available to connect to the original harness and those connectors you pictured earlier.

So, @pauleyman is suggesting that some wiring exists on your car already. We would assume it’s an adapter harness but you can show us what you have and we can figure out where exactly you are and where to go next.

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[pauleyman]

correct. If this car ran with the parts in the pics it had to have an adapter harness at one time for the 2ga cas

 

[pauleyman]

So it could very well be a 6-bolt ...so then I would need the adapter harness which I suspect a previous mechanic lost...

Would that be this part? https://www.extremepsi.com/store/Sh...S-harness-Mitsubishi-Eclipse-97-99-Style.html

What makes you think it's a 6 bolt. That really doesn't mater anyway. I will say no because your front cover supports the 2g wiring harness suggesting that is a 2g motor. Moot point for this discussion

 

[nix4]

Greetings I have a 1g block that may have a 2g cam sensor? I still have the old 1g cam sensor (puck) on the side that my mechanic is confused about. I have some more images he sent. Is it possible a 1g block with a 2g cam sensor would have a specific way to wire up the harness to it? that possibly an adapter harness is missing for this application?

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[pauleyman]

The cas sensor has no bearing on what block you have. Show us the cam gears. 95 96 are specific and the cas is under the gear. 97 up it goes back to passenger side but looks completely different. You definately have a 1g cas on the passenger side.

 

[nix4]

I have one image, I can get more if needed.

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[miliman13]

Hey
You have a 6 bolt block in a 2g (originally 7 bolt)
You have a 6bolt / 1G CAM harness

“visible from the first set of pics “

It appears as if someone has already spliced the harness (connecting both the original Cam and Crank sensor wires) together into the 1G cam sensor.

The provided information is everything you or your mechanic needs to properly identify your harness , the diagram of how this sensor is connected has been provided

And you also must change the ignition firing order via the cables when using a 1G in a 2G assuming you have a 95 eprom ECU

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[nix4]

Hey
You have a 6 bolt block in a 2g (originally 7 bolt)
You have a 6bolt / 1G CAM harness

“visible from the first set of pics “

It appears as if someone has already spliced the harness (connecting both the original Cam and Crank sensor wires) together into the 1G cam sensor.

The provided information is everything you or your mechanic needs to properly identify your harness , the diagram of how this sensor is connected has been provided

And you also must change the ignition firing order via the cables when using a 1G in a 2G

So what confuses me, is that 1g cam "Puck" sensor was never used in my build to my knowledge. I was doing something else, and have always wanted that sensor removed because we were not using it. Now this new mechanic I'm working with sees this puck and also the harness and things aren't adding up... Sadly I dont know enough about this part of my build because its never been an issue before, this engine has been running and I simply added an intake manifold and now I have more issues.

So from your response this is probably a harness that needs to be made to get the engine harness plugged into the 1g CAM sensor?

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[miliman13]

Steve already provided this for you

Just focus on this thread for now

2G - 2g DSM Engine Bay Electrical Connections

This article is designed to help 2g owners identify all the plugs in the engine bay.The photos and wire colors were based off of a 1999 Eclipse GSX, so other years and models may vary in location and wire color.I would like to give a HUGE thanks to turbosax2 for helping with the photography...

www.dsmtuners.com

And NO
That harness doesn’t need to be made !!!
You already MAY have it.

I recommend you review some of the great threads on this site
To help you familiarize yourself with your equipment

Search topics : 6bolt swap

 

[pauleyman]

Hey
You have a 6 bolt block in a 2g (originally 7 bolt)
You have a 6bolt / 1G CAM harness

“visible from the first set of pics “

It appears as if someone has already spliced the harness (connecting both the original Cam and Crank sensor wires) together into the 1G cam sensor.

The provided information is everything you or your mechanic needs to properly identify your harness , the diagram of how this sensor is connected has been provided

And you also must change the ignition firing order via the cables when using a 1G in a 2G assuming you have a 95 eprom ECU

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How did you determine 1g block from those pics? Im not seeing it. Op is also using 2g timing belt covers. You can see that in the pic.

 

[19Eclipse90]

There is nothing that I see suggesting that the block is a 6-bolt.

As Paul stated, the pictures in post #3 shows the pigtails for both the 2Ga cam sensor and crank sensor coming out. It reasons that if those pigtails are coming through that the timing covers are for a 2G. 2G timing covers do not bolt up to a 6-bolt block.

It has a 1G thermostat housing and 1G CAS in place but those can be bolted on to any head and has no bearing on what the block is.

If it is a 2G block, the 1G CAS is just a placeholder (i.e., a really expensive cam end plug)

I do see, @miliman13 , that it appears in the very first post that the 1G CAS has a connector attached to it. But that’s about it.

 

[pauleyman]

So what confuses me, is that 1g cam "Puck" sensor was never used in my build to my knowledge. I was doing something else, and have always wanted that sensor removed because we were not using it. Now this new mechanic I'm working with sees this puck and also the harness and things aren't adding up... Sadly I dont know enough about this part of my build because its never been an issue before, this engine has been running and I simply added an intake manifold and now I have more issues.

So from your response this is probably a harness that needs to be made to get the engine harness plugged into the 1g CAM sensor?

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You have a 2ga intake gear but I can't see if the sensor is there. You may have both the 1g and 2g cas installed but obviously only using one.

 

[nix4]

I think I do have both as I wanted to remove the 1g puck sensor as it wasn't used...but its been many years and I'm unsure. Would speed density or MAF setup determine how these sensors are wired up?

 

[19Eclipse90]

Would speed density or MAF setup determine how these sensors are wired up?

No.

 

[miliman13]

There is nothing that I see suggesting that the block is a 6-bolt.

As Paul stated, the pictures in post #3 shows the pigtails for both the 2Ga cam sensor and crank sensor coming out. It reasons that if those pigtails are coming through that the timing covers are for a 2G. 2G timing covers do not bolt up to a 6-bolt block.

It has a 1G thermostat housing and 1G CAS in place but those can be bolted on to any head and has no bearing on what the block is.

If it is a 2G block, the 1G CAS is just a placeholder (i.e., a really expensive cam end plug)

I do see, @miliman13 , that it appears in the very first post that the 1G CAS has a connector attached to it. But that’s about it.

I did a quick peak comparison with my spare 6/7 parts and based on the CAS in his first image and what seems like excess or unused / unidentified - connectors/ harness plugs.

I naturally assume it was all do to a classic 1G in a 2G, I have extra hanging plugs because I spliced my harness rather than buying the one that plugs into those said lose connectors.

But I could just be completely wrong .

How did you determine 1g block from those pics? Im not seeing it. Op is also using 2g timing belt covers. You can see that in the pic.

You mean the black plastic cover that’s classic 2G !

Oh yeah …..

………………

 

[19Eclipse90]

Yeah, the “unused” plugs pictured in post #10 look like they’re on the harness that is on the ground and outside of the vehicle.

Of those connectors, one is definitely the connection for the 2Ga CAS (3-pin rectangular), one is definitely the TPS (4-pin rectangular), and the last one is either the 2G CPS or CAS, depending on wire colors. If the wires of the triangular one match the wire colors of the CPS (triangular connector in post #3), then — assuming that both sensors are good and the harness is unhacked — the OP simply needs to join up the connectors from post #3 to those matching in post #10.

We have not seen what connects to the 1G CAS other than there appears to be something in the first picture. We do not know what the rest of the harness looks like.

 

[nix4]

Well I got the info I needed! we have spark and just need to re-adjust some things. Appreciate the excellent info here. This isn't my first post here and every time I get the answers I need.

 

[miliman13]

Well I got the info I needed! we have spark and just need to re-adjust some things. Appreciate the excellent info here. This isn't my first post here and every time I get the answers I need.

Curious what the solution and the problem was.?

Since now you’re good.
It’s always great to leave some feedback
So others can gain from it.

 

[nix4]

The issue was a mechanic who had not worked on a DSM before finding two different CAM sensors and a wiring harness that just didnt plug in where he assumed it should. After finding out that it had a 2G CAM sensor located elsewhere and the need to bridge the harness...the car starts and we're moving on to timing adjustments. It didn't help that the 1g puck makes it kinda work...I've asked to have it removed years ago ...nobody did it...it still needs to get done I think the best solution if if you are your mechanic are new to these modified blocks then you really should do a bit of research on whats actually on the block and where everything is before freaking out..which leads you to posting here... I've been trying to complete my 95 GSX for about 10 years now and due to the fact that I live in areas where there are few who know how to work with these, I've had nothing but headaches. But I'm once again back to the point I was 5 yrs ago and the car is turning over and running.... wish me luck.

UPDATE: added a photo showing the bridge harness (temporary of course). The issue must have been the previous mechanic loosing this harness and my current mechanic being confused. Car now turns over and sounds good. We then readjusted the timing and belt tension (again all botched by previous mechanic). We're looking into a minor fuel line issue and then we may get a steady idle.

Though I wonder, the car was tuned with a smaller throttle body and air intake. I have since moved to the 72mm? Big air intake and matching throttle body..would this call for a new tune? (attached photo showing new intake).

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