cubbies1031

Got my sr swap done and running. Went to start it again and it just cranks. Thought it was cas so replaced it and still just cranks. Replaced ignitor chip and still just turning over. Think maybe the solid motor mounts knocked a ground loose. Which ground on the car can cause this? Timing is set right and fuel pump primes. Nothing changed and it won't start still. It has to be a ground from everything I've seen so is there a diagram I can look at for grounds on an s14 sr or can someone please tell me

s14freak93901

fuel is priming so it's most likely not getting spark. a loose or bad ground will cause this.

cubbies1031

Yep spark and fuel and good plugs

Ekin_s13

fuel injector pulse signal?

cubbies1031

Yea that's good to it just has to be something small like a ground I was thinking I mean it ran and nothing changed but went to start it again and just cranking

Ekin_s13

check the CAS again?

cubbies1031

I have checked the cas time and time again I'm just at a loss

cubbies1031

Is there a relay that could cause it and if there is what why would it go bad all of a sudden like that?

JuMPiiN

Finishes my swap, replaced the MAF, CAS, ignitor, spark plugs, coils, coil
Harness, next thing I try is the ecu. Mine turna over, but won't start and I have fuel and spark and the fuel pump primes everytime so if you figure yours out let me know.

cubbies1031

man sounds like were in the same boat im prolly just gonna call up this guy i know who does swaps all the time to come to my garage to figure this thing out i have no more patience for it. honestly it makes me wanna just up and sell it

tinys s14

Got an engine ground from body to motor? Every motor needs one

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JuMPiiN

Yea I have the exact same problems your having, and yes I have a ground from engine to body, a 4ga. It helped, but still won't start Atleast thats my case.

cubbies1031

ill put one on tomorrow. whats a good place to ground to on the motor

cubbies1031

so how do we solve this problem we are all having lol

JuMPiiN

I have no idea, I'm buying another ecu only thing I can think of.

cubbies1031

Please let me know if that works for you like I said if I can't get it started this week I'm just gonna sell it I've got too much time and money in it

Rusker

Figure it out?

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1990 S13/SR20

KiLLeR2001

If you have spark and fuel, then its timing. What's your compression for each cylinder?

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cubbies1031

timing was correct it was a bad ground on the back of the head

rollout240

By any chance did you change your oil? if yes maybe you touched ground to the alternator???? create a spark and its toast. check the 75w or amp whatever it is. in the fuse box the grey one with the clear top. if it's broken then there you go. its all i could think of.

kinda weird but just throwing it out there. good luck!

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"Take it to the Dome!!"
http://rollout240.blogspot.com/

jvega

i had a very similar problem with mine.
turned out to be the timing was off.
i had to put the marking on the crank on the *First marking to the left* instead of the Second marking for *Top Dead Center*.
-5,0,5,10,15,20
i had to put mine at -5

now it runs good!

Hope this helps someone!