4g63 question concerning type and from what year, did not come with car

[kris9950]

Ok I have searched many times on this forum, and have not found the specific questions. I my self am from mirageforums.net and i have a 93 dodge colt 2 door coupe. I had a 4g15 until recently i purchased a 90 jdm NA 4g63 from a galant or so i was told. I went out and purchased a 91 eclipse NA wiring harness and 91 NA MPI relay and also i Purchased a 92 NA plymouth laser ECU. I connected everything on the engine and the 91 harness plugged right in to the engine even the coil pack had the correct harness. The only difference was my distributor and then i went out and purchased a 91 dizy and connected it to the harness.
I spliced the correct wires from my interior colt harness to the mpi relay on the dsm harness. The problem is that car wouldnt start it turns over but doesnt start. So that is when i suspected the distriburator so i changed it. The car didtn start on the first attempt, So i sprayed some starter fluid into the intake and tryed starting the car and it started then shut off ( guessing it didnt get more fuel).

Im not sure how i can find out what engine i have or what it came out of. Im just wanting my car to start so i can drive the beauty. I know its a first gen because its 6 bolt, and the coil pack seems to not be a 90's pack so im just going by what the previous owner said. The car the engine came out of was rearended and had a bad automatic transmission.

If possible can someone please help me identify what engine and what car it came out of and how to get my car started....

Also will the setup from the mpi wire harness and ecu work.?

Thank you

Kris

 

[anubis]

i didn't know that the 4g63 ever had a distributor... maybe because it never did or maybe because i've never seen or heard of one.

there should be a code on the block somewhere. hopefully you can find it. if it's a sirius engine, it should be on the front right of the block on an angled flat spot.

can you post some pictures of the engine?

 

[kris9950]

maybe it isnt a distributor, it would be what is on top left of the head by the valve cover that is round, You can see pictures here,


http://cgi.ebay.com/ebaymotors/ws/e...item=150034771531&indexURL=4#ebayphotohosting

Other then the vin is there any other way, im afraid if the vin is under the exhaust manifold i wont be able to find out til saturday.


Thanks your help is greatly appreciated

Kris

 

[19Eclipse90]

maybe it isnt a distributor, it would be what is on top left of the head by the valve cover that is round, You can see pictures here,


http://cgi.ebay.com/ebaymotors/ws/e...item=150034771531&indexURL=4#ebayphotohosting

Other then the vin is there any other way, im afraid if the vin is under the exhaust manifold i wont be able to find out til saturday.


Thanks your help is greatly appreciated

Kris

That motor looks like the motor from my 90 N/T. The round thing on the top left of the valve cover is a Cam Angle Sensor (CAS). If it is from a 90, I'm decently sure that it can only use a 90 ECU because of the differences between the two years. The harness may also need to be changed, but I do not know that much about it. Maybe a wiseman will chime in after a while, but as far as I know, you should need a 90 ECU.

 

[kris9950]

ok i changed the cas to a 91 last saturday ### i thought that would also be a reason, so if the engine is a 90 then wouldnt it have a diferent plug on the coil pack, i read something about it on the dsm cd webside i think by mike hamilton. The coil pack i have plugs directly into the 91 harness.. any other high lights?

Kris

 

[19Eclipse90]

ok i changed the cas to a 91 last saturday ### i thought that would also be a reason, so if the engine is a 90 then wouldnt it have a diferent plug on the coil pack, i read something about it on the dsm cd webside i think by mike hamilton. The coil pack i have plugs directly into the 91 harness.. any other high lights?

Kris

Yes it would be different for a 90. A 90 coil pack has a square plug while a 91 and up has a triangular plug.

 

[Raph]

edit

 

[anubis]

yeah, definately a 4g63. yes, the round thing is the CAS ( - it's ok).

what 19eclipse90 said about the conection for the coil pack is correct. from your original post, it seems like everything is matching up. it should work. i'm having trouble following everything that's going on in this thread at the moment. i'll come back when i'm more focused and re-read.

keep us posted.

oh, here's a picture of where to find the engine code.

 

[kris9950]

You dont know how awesome this forum is... I feel totaly honored and you guys rock!

Back on subject

I understand about the coil pack but what i dont understand is if it is a 90's engine then why does it have the 91 style coil pack? also if im converting the engine to be able to use the 91 harness then what else do i have to change other then the CAS and the Coil pack (thats already changed) Also to make sure I will be able to use a 92 ECU from a g63 laser non turbo Correct?


Guys I appreciate this tons, hopefully ull get to see some pics of the 1g dsm colt

Kris

 

[19Eclipse90]

The cruise control in a 90 if so equipped will be located in front of the batter by the BOV rather than on the firewall, so you will need to find a way, if you want to keep it, to make the connection between the plug on the firewall and the cruise control's location.

 

[kris9950]

Nope my car nor the engine has cruise, but would i need to change any sensors or anything i want to try to get it running sometime soon.

Kris

 

[19Eclipse90]

Other than the CAS, I can't think of any differences in the sensors. If it's cranking but not starting than than the problem most likely lies in the fuel or spark. Make sure the plug wires are correctly ordered, the spark plugs are good, the fuel pressure is good, etc. It seems that you are almost there, and only a few things at this stage can keep the car from starting. Check and recheck everything. That's all the advice I can give. Good luck!

 

[quest49s]

Have you done a compression check on the motor since you got it?

 

[kris9950]

No i have not done a compression check on the engine, the engine was running before i got it. The engine does start but it looked as if the battery was dieing after 3 turns, so i checked the battery by putting it in another car and it started that car right up. So then this morning what i did was change spark plug wires, fixed all my grounds and connected them except the one to the MPI relay, the i took spark plugs out and looked at them. The were a little black but still looked new, so i cleaned them up with some emory clothe and regapped them to about .041 and then put them back in. I turned the key and wala car started again for 3-5 seconds then i let the key go and it turned off. Seems im not getting fuel. How do i check to see if im getting fuel? Also how do i see if i have a BAD MPI relay? Another thing i noticed is that i had to push the accelarator in and act as a "pump" while i was trying to start it. ANY ideas?


Thanks to the greatest extent Kris

 

[19Eclipse90]

No i have not done a compression check on the engine, the engine was running before i got it. The engine does start but it looked as if the battery was dieing after 3 turns, so i checked the battery by putting it in another car and it started that car right up. So then this morning what i did was change spark plug wires, fixed all my grounds and connected them except the one to the MPI relay, the i took spark plugs out and looked at them. The were a little black but still looked new, so i cleaned them up with some emory clothe and regapped them to about .041 and then put them back in. I turned the key and wala car started again for 3-5 seconds then i let the key go and it turned off. Seems im not getting fuel. How do i check to see if im getting fuel? Also how do i see if i have a BAD MPI relay? Another thing i noticed is that i had to push the accelarator in and act as a "pump" while i was trying to start it. ANY ideas?
Thanks to the greatest extent Kris

So you started the car without the MPI relay plugged in?
If you have a Haynes manual, there is a step by step process in testing the MPI relay, I can't remember off the top of my head exactly how to do it.
Check the fuel pressure! If you had to use the accelerator as a pump, than the fuel pressure must not be very high. How old is the pump, is it the original? When was the last time the fuel filter was changed?

 

[kris9950]

no misunderstanding. The MPI realy was plugged in but the ground thats closes to it was not grounded. And the fuel pump is from a 93 dodge colt 1.5l engine. The pump was good because the car ran until i took it out for the engine swap and the filter was changed right before the car was taken off the road. I have read numerous site saying that the fuel pump will be good for the 4g63 NA engine but if i go to a turbo ill ahve to change it. So i dont have a haynes or chilton i have the factory service manuals



Kris

 

[19Eclipse90]

The Haynes manual is very valuable. I highly recommend you invest in one.
That pump is not sufficient for the 4G63T. Get a high flow fuel pump; the stock NA fuel pump is hardly sufficient enough for a 4G63T. Keep us updated!

 

[kris9950]

k i went out and purchased the haynes manual.... thanks for the advice. Also im not running a g63T im running a naturally aspirated g63 so the fuel pump should be sufficient....

 

[kris9950]

OK! so i wired my fuel pump straight to the battery and changed the plugs (i forgot to do that earlyer) and i cranked and she started! but itll stay on for about 45secs and then die start it back up and push the accelarator and she dies any ideas?

Kris

 

[kris9950]

i got her started and to idle! seems it needed about 5 turn ons... maybe something clogged? anyways it started now i need to hook my gauges to make sure im good on everything....... sounds like its idling kinda rough though....... and also i changed the ecu from a 91 to a 92 lasers and thats when it started up with no problems...... weird...
any help on why it idles rough? I have good gas but its 87octane pump....

anyone know what cable turns the fuel pump on through the mpi relay?

thanks guys

Kris