1G 92 Talon TSi rebuild wont start

[siccboostsi]

i have been working on the shell i used to have. i have rebuilt an engine and put it in with a new 60-1 turbo and rebuilt transmission, we even painted the car and put some extra performance stuff on it like a sheetmetal intake mani, and a 3.5 inch intake.

well now it is time to start the 1g but, it wont get fire to cylinders 1 and 4. i took the coil pack and transistor off and tried it on the 2geezy and they worked just fine. i then took the cas off of my 2g and it still didnt make a difference when i put it on the 1g.

so i began to think continuity, i checked this from the coil to the transistor and the three wires are good. but when the key is off the ground and the hot both (beep) wich mean continuity? let me clear this up, when i put one side on the black/white wire that is on the coil harness it will beep even when i put it on the black wire that is on the transistor harness aswell as the black/white. but when i turn the ignition on the ground then only beeps with another ground which is normal. the hot black/white wire then has 11volts and beeps with the white wire and the black/white wire on the transistor harness. the white wire on the transistor harness reads 10 volts is this normal?

then i checked the wires going back to the ecu, on the transistor there are three wires on one side and four on the other. three come from the coil pack which checked out to be continuous. then i checked the other four to the ecu and it all checked out to be continuous.
oh ya i also took my ecu to a freinds house and it fired his 1g no problem.

what could be the problem? any help would be appreciated. i am thinking about replacing the harness but it all is working except this problem.

if the cas is bad will it fire at all? could it be the cas only firing 2 cylinders or could somthinng be wrong with the positioning of it?

thanks
Ruben S Hernandez G.N.

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[khartley]

This may not help at all, but the spark plugs are almost always overlooked when diagnosing a no start problem. When you are cranking and cranking on an engine, its so easy to foul them out.

Just check them, and since they are a window inside your engine, it may help you fix the problem if it isn't the plugs.

 

[siccboostsi]

i will try that today and get back. anything is worth a try at this point thanks.

 

[belize1334]

Are you certain that you're getting fuel? How do you know that it's cyl 1/4 and not perhaps 2/3 or even all of them?

 

[siccboostsi]

yes i do believe i am getting fuel the plugs are full of fuel when i pull them out. and i can smell fuel after i am done cranking on it. the number 2 and 3 cylinders are firing b/c i see the sparkplug firing, but 1/4 wont fire the plug. i also checked the oms for the two coil packs and they are good.
i didnt get a chance to go work on it today but i will try tomorrow. i will try and switch the spark plugs that are firing with the ones that are not just to make sure it is not the plug.

one thing i think it could be is the cas i dont know what year it came off of, but it is a plug in style black top. it plugged right in to my harness so i thought it was the right one any help would be appreciated.

 

[nightgamer]

this sounds like a cas problem with only 2 and 3 firing i would make sure u have the right one and then test it

im not sure but i have a green top cas on my 93 wiith a 6 bolt swap

 

[siccboostsi]

is the green top a plug in style as well or pig tail?

 

[siccboostsi]

okay so here is what i got i have a black top plug in cas which is for a 93-94, my car is a 92 does this make a difference?

????

so does anyone know if this would be the problem?

 

[belize1334]

No that shouldn't be a problem. If the car was originally a 6-bolt then any 6-bolt CAS should work except for the '90 (which is the black-sheep of 1Gs).

If 1/4 aren't firing but 2/3 are then I'd say it's almost certainly a coil-pack issue. But, just to make sure that we're not missing something stupid, make sure that you try swapping your plug wires. It's unlikely that a given pair would fail together but it's not impossible.

Assuming that it's not the plug wires or the plugs themselves, you should do a live check of the coils. Remove the coil pack and look at the bottom where the wires are bolted to the terminals. Both coils should share one wire (the power I believe) but then the second wire (ground I think) should be unique for each coil. They are controlled by selectively grounding one coil and then the next. To test whether it's the coils themselves or the ground signal, swap the ground wires. This will cause the coils to fire 180* out of phase so you'll have to switch the plug wires too. Now you've effectively swapped out which coils are controlling which cylinders. Repeat your spark test. If you get the same results then it's the signal. If the results are the opposite then it's the coils.

 

[siccboostsi]

okay so any 1g cas should work so no need in changing it out. i will try this out tomorrow to see what happens. the only thing is that i tried the coil pack on my 2g and it fired up no problem. so i was guessing it was the signal, but i checked continuity and they all looked good.

 

[siccboostsi]

so after more testing and evrything checking out as okay, i decided i guess that i am going to replace the whole wiring harness. has any one herd of people doing it with the motor in the car or would i have to take it out. also does any one know where to get a good used engine wireing harness for a 92 six bolt talon tsi?