90 gsx will absolutely not start..

[allrice4g63]

So I i just finished up swapping a head onto my buddies 90 gsx and now it will not start. I have the dowel pins on the cam gears at 12 oclock with marks facing each other. Piston number 1 is at tdc, crank mark lines up perfectly, i spun the motor over a bunch of times by hand and everything lines back up.
The car is getting spark, getting fuel to the rail and out of the rail. i adjusted the cas every wich way, i tested the fuel pump via the fuel pump tester up behind the battery and the pump kicks on, I took the cas out and spun it with the key forward and you can here the pump kick on and the plugs fire, I have tested each injector plug and there is power to every one. i even went as far as pulling the rail and cranked the car and every injector sprays fuel. compression is perfect on all 4 cylinders.
Now if you leave the car sit for say 5 min when you crank it pops off then dies. i sprayed starting fluid in the intake and it started and ran then we shut it down quick. Anybody have any other ideas why this thing wont start when every key ingredient is there to make it run? Faulty coolant temp sensor?

 

[rlacasse1]

I find it kind of weird that it would start with the intake piping disconnected, but not any other way. Makes me think something is up with your MAF or something else along the intake track.

Is it all the intake piping and intercooler piping connected and the MAF plugged in when you are trying to start it?

 

[allrice4g63]

yes sir all intake piping is intact. I did a test to see if the turbo was spinning when he was trying to start it. When my buddy was cranking the car the turbo didnt seem to wanna spin but when you put ## fingers in and spin it by hand it spins fine? it should still start though regardless. honestly am stumped on this its gotta be either the ecu or i heard that a coolant temp sensor could cause this but i dont know if i believe that. I keep telling my self the timing is off but there is no possible way it could be i even made sure the metal plate on the crank where the balance shaft goes around was the right way so i wasnt 180 degrees off it really makes no sense. And yes the maf is plugged in and the car ran prior to the old timing belt snapping.

 

[rlacasse1]

Well the temp sensor can cause it to not want to start. So it's worth checking out.

When it started for just a few seconds did it sound like it was running good, or was it choppy like it was missing?

 

[Colt4G63 also]

If it runs when you add starting fluid, then it sounds like the key ingredient is fuel.

It has good compression right?

Ps. The temp sensor can cause a no start. Typically they read too cold and cause flooding, but it can theoretically go the opposite way too.

 

[Absit]

If it runs when you add starting fluid, then it sounds like the key ingredient is fuel.

It has good compression right?

Ps. The temp sensor can cause a no start. Typically they read too cold and cause flooding, but it can theoretically go the opposite way too.

Pull your injectors, make sure they're squirting.

 

[allrice4g63]

sounded smooth, Ok i know this might be a long shot but i did noitce when i was swapping over the cam gears to this new head my buddy ordered it said b and c on the camshaft. Now my natural assumption would be brian crower but i dont understand why a 300 dollar ebay reman head would come with bc cams unless they were ground down to oem cams. EVen then i think the car would start unless they were massively huge cams. The place he got the head from accepts cores so you have to send your old head and cams back or they charge you a core. Now if somebody sent in a head and they remaned the head and cams if they are bc would this cause a no start issue maybe timing is off. UGH even that wouldnt make sense it should still start just run shitty. wtf
I already pulled the whole rail with all four injectors installed and he cranked it and every injector fired. compression is 175 across the board did a compression test like 5 times

 

[Colt4G63 also]

Is your injector resistor unplugged?

I have BC cams with stock timing sprockets and my timing isn't off.

What does that have to do with not getting fuel? Just because it flows out of the regulator doesn't mean fuel is coming out of the injectors.

 

[rlacasse1]

He already said it has good compression and he is getting fuel.


I would now check the temp sensor, at least check out the wires and makes sure they aren't brittle or broken.

Are you sure your firing order is correct?

Is your injector resistor unplugged?

I have BC cams with stock timing sprockets and my timing isn't off.

What does that have to do with not getting fuel? Just because it flows out of the regulator doesn't mean fuel is coming out of the injectors.

He already said that he has fuel coming from the injectors.

 

[Colt4G63 also]

He already said it has good compression and he is getting fuel.


I would now check the temp sensor, at least check out the wires and makes sure they aren't brittle or broken.

Are you sure your firing order is correct?



He already said that he has fuel coming from the injectors.

Yeah good point, I missed that. He also said it runs smoothly with starting fluid so it's not firing order. I guess the fuel must just not burn. It's defective.

 

[rlacasse1]

Must be.

Although, I wonder if when he tried the fluid if he left the intake pipe off. Cause to me that means it was probably something along those lines.

He said he has tried with everything connected, but he never said what he did when he used starter fluid.

So, OP, was the pipe disconnected at the throttle body when you used starter fluid? Or did you spray some in and then put the pipe back on?

Oh, here's another question, did you get it to start on starter fluid before or after you took the cas off?

Are you sure you put it back on correctly and not 180 out?

 

[allrice4g63]

Ya not to sure how long the car has sat for. he just picked it up about 3 weeks ago. I guess bad fuel would cause it not to start but it would have to be really bad. Would the turbo not spinning when its cranking cause it not to start? Yet the turbo spins freely when i spin it by hand. Coolant temp sensor is a possibilty but a no start....... hummm i guess im gonna crack the ecu open and see if any of the capacitors are leaking. But then again if the ecu was bad the injetors wouldnt spray or the plugs wouldnt spark. As for it flooding out i pulled the plugs and they are all dry. Im not new to dsms in any means but this thing is rediculous. I know the 90s are way differnt in the wiring am i missing something here.

i put the cas in correct i lined up the little pin. I took the pipe off the t.b. elbow had him hold it at wot and i sprayed a shit ton in, then put the pipe on quick and had him crank and it popped and ran smooth then i had him kill it right away.

 

[rlacasse1]

Oh, well in that case replace your gas and see what happens.

And yes a temp sensor will cause a no start. Trust us. Your car will not start or it will be a bi*** to ever get going if the sensor is bad, or the wires are jacked up.

 

[Absit]

He said he was getting fuel at the rail and return, never mentioned the injectors firing..

 

[Colt4G63 also]

I'm thinking try new fuel, and no the turbo doesn't need to spin while cranking. There's just not that much exhaust flow to get it going during cranking.

 

[rlacasse1]

Oh, and I would probably check the timing again, just to be sure.

 

[Colt4G63 also]

He said he was getting fuel at the rail and return, never mentioned the injectors firing..

I didn't think so either, but low and behold it's right there in post #1.

So I i just finished up swapping a head onto my buddies 90 gsx and now it will not start. I have the dowel pins on the cam gears at 12 oclock with marks facing each other. Piston number 1 is at tdc, crank mark lines up perfectly, i spun the motor over a bunch of times by hand and everything lines back up.
The car is getting spark, getting fuel to the rail and out of the rail. i adjusted the cas every wich way, i tested the fuel pump via the fuel pump tester up behind the battery and the pump kicks on, I took the cas out and spun it with the key forward and you can here the pump kick on and the plugs fire, I have tested each injector plug and there is power to every one. i even went as far as pulling the rail and cranked the car and every injector sprays fuel. compression is perfect on all 4 cylinders.
Now if you leave the car sit for say 5 min when you crank it pops off then dies. i sprayed starting fluid in the intake and it started and ran then we shut it down quick. Anybody have any other ideas why this thing wont start when every key ingredient is there to make it run? Faulty coolant temp sensor?

Maybe he used the EDIT button?

 

[rlacasse1]

He said he was getting fuel at the rail and return, never mentioned the injectors firing..

Dude, read line 6 & 7 of his original post.

 

[Absit]

Oh, look at that..

 

[allrice4g63]

He said he was getting fuel at the rail and return, never mentioned the injectors firing..

I said i even went through the trouble to pull the whole rail. I bolted the line from the filter to the rail back on and put the return line back on left all four injectors in the rail. put a towl over the valve cover had my buddy crank the car and all four injectors were spraying fuel all over ME!!!!! So i know they are firing. So we have it narrowed down to coolant temp sensor and bad fuel. I Just called my buddy and he said the wires going to the coolant temp sensor were broken off right at the sensor plug soooooo that ###### the problem. I will let you guys know what happens now i have to find a coolant temp sensor plug and wire that in.

 

[Colt4G63 also]

Dude, read line 6 & 7 of his original post.

Line 11, 12, and 13 on my computer.

 

[Absit]

You're right, I just had a hard time seeing it in your poorly formed wall of text, I apologize.

 

[Colt4G63 also]

I'm blaming the lack of capitalization.

 

[allrice4g63]

as for checking the timing Dowel pins at 12 oclock timing marks on cams facing each other. piston 1 is at tdc, timing mark on crank lines up perfect, spun the motor over bunch of times and everything lines back up including the oil pump and balance shaft that my buddy refused to let me remove.grrr

 

[rlacasse1]

I said i even went through the trouble to pull the whole rail. I bolted the line from the filter to the rail back on and put the return line back on left all four injectors in the rail. put a towl over the valve cover had my buddy crank the car and all four injectors were spraying fuel all over ME!!!!! So i know they are firing. So we have it narrowed down to coolant temp sensor and bad fuel. I Just called my buddy and he said the wires going to the coolant temp sensor were broken off right at the sensor plug soooooo that ###### the problem. I will let you guys know what happens now i have to find a coolant temp sensor plug and wire that in.

Well, then get those wires fixed and let us know where that gets you. Sounds like it's your problem.