sr20 fuel and spark no start

[Driftpretty]

so had a dohc chassis transfered it all to a sohc chassis only wiring i changed was the dash plug and that wiring is perfect ive done it countless times.

Has fuel into the cylinders
Has spark
good fuel pressure
new plugs
cas works
wiring perfect
CAS timing perfect
Ignitor works
new fuel filter
ecu worked fine in my old car.
grounds are all good
injectors all have the FSM recommended voltage and such.

So i have fuel and spark, and nothing even happens..

[Driftpretty]

tried brand new harness still nothing

anyways something odd happened...went to go try to start it today and first attempt it popped, like a little backfire. then nothing after.

[wangan_cruiser]

Check timing. That happened to me before. It was 180 degrees out.


Then pull codes on ecu

[Driftpretty]

i have an E5 ecu and it doesnt pull codes.. timing is on point like i posted. I pulled the motor out of my running vert it sat for two weeks while i was finding a new chassis and put it all in new chassis and now this.

[Driftpretty]

bump i hate my life.

[cotbu]

You can't say timing is spot on if you can't start.
You need to start the car before timing can be set to perfect.

That pop or backfire is because it fire to late or early, which means there is fuel still in the cylinders, no fire because time was wrong.
The only other explanation for a perfectly timed engine not to start and backfire is CTS or Low compression.
You can see if you fall into these categories as I try to remember the symptoms.

CTS backfires in the intake
Low compression, Lot of cranking then as pressure builds you might get an small explosion, not enough to trigger the combustion cycle.

CTS easy fix, usually cost money
Setting and/or check timing free

BTW, the injectors recommended voltage? 14v and it could anywhere from 14v to 11v. but the ecu needs to trigger the ground for them to fire.

Hating your life at 19yrs old, classic!

[Driftpretty]

You can't say timing is spot on if you can't start.
You need to start the car before timing can be set to perfect.

That pop or backfire is because it fire to late or early, which means there is fuel still in the cylinders, no fire because time was wrong.
The only other explanation for a perfectly timed engine not to start and backfire is CTS or Low compression.
You can see if you fall into these categories as I try to remember the symptoms.

CTS backfires in the intake
Low compression, Lot of cranking then as pressure builds you might get an small explosion, not enough to trigger the combustion cycle.

CTS easy fix, usually cost money
Setting and/or check timing free

BTW, the injectors recommended voltage? 14v and it could anywhere from 14v to 11v. but the ecu needs to trigger the ground for them to fire.

Hating your life at 19yrs old, classic!


haha ive been messing with these damn things for 5 years. I know timing is spot on because i pulled it out of my running vert knowing timing was on point. I cant stand that people keep saying timing! haha.

[godrifttoday]

haha ive been messing with these damn things for 5 years. I know timing is spot on because i pulled it out of my running vert knowing timing was on point. I cant stand that people keep saying timing! haha.


Why can't you stand people trying to help you out? Do you think they magically know what you know???

[Driftpretty]

I was pretty sure I posted a ton of info up top! It's clearly not timing unless it magicly changes it self while sitting out of a,car for two weeks. lol

[godrifttoday]

Then all I can think off is you are lacking compression

[OnTheChip]

When you say "transferred it all", you mean engine and engine harness? Using the dohc ECU?

[idahotuner]

you can set timing before the car start!

[Pandadub92]

check your coil

[cotbu]

you can set timing before the car start!
You mean mechanical, yeah you can, and that's the crank to cams chain time that's it. If that is correct the sr20 cas will start the engine, anywhere between fully clockwise and fully counterclockwise position, but I guarantee that you ign timing is not correct. Setting the CAS in the middle of the bolts is not correct(15deg), and never was meant to drive on. You need a running engine to time it period. No tuner anywhere ever tunes with, set you cas to the middle and bolt it down.
So again mechanical and ignition timing which one is his problem again. Ignition and his cylinder are probably getting filled with fuel.

So I just want to say that, if you are at TDC and stab the cas correctly, the engine will start. unless there are other issues but I personally would not start with replacing the harness.

[Driftpretty]

You mean mechanical, yeah you can, and that's the crank to cams chain time that's it. If that is correct the sr20 cas will start either fully clockwise or counterclockwise position but I guarantee that you ign timing is not correct. Setting the CAS in the middle of the bolts not correct. You need a running engine to time it period. No tuner anywhere ever tunes with, set you cams to the middle and bolt it down.
So again mechanical and ignition timing which one is his problem again. Ignition and his cylinder are probably getting filled with fuel.

The timing was never touched. Mechanical timing is on point and before I pulled the motor from my vert it was set correctly while running. It's obviously something weird Maybe not enough spark idk. Coils tested okay though and of course I'm using an sr harness and ecu..

Compression is also good.

[cotbu]

Is there some reason you won't even try, re stabbing the cam angle sensor?
You do know what the cas does, correct? if it is set correctly maybe ignitor, but you could just pull all the coilpacks and check for spark, and listen for the injector to fire

[Driftpretty]

Is there some reason you won't even try, re stabbing the cam angle sensor?
You do know what the cas does, correct? if it is set correctly maybe ignitor, but you could just pull all the coilpacks and check for spark, and listen for the injector to fire

I mean there is no need to restab the cas. Its set up perfectly fine.. i was just driving this engine two weeks ago. Injectors click, spray and the coilpacks when touched to valve cover with a spark plug spark.

I also previously posted i tried another known working ignitor and it was no change. not trying to be a prick just trying to get some other input aside from timing, since it hasnt been touched since it was in the car i drove two weeks ago.

What are the coilpacks supposed to put out power wise while cranking?

[Driftpretty]

Also drained all of the gas and put 2 gallons of fresh 93 in.

[cotbu]

I have something for you to try!
go try to start you car normally no pumping or touching the throttle, turn the ignition 3x then turn the key off. remove the fuel pump fuse and crank the engine it should fire immediately but there is no fuel so you know what should happen, then put the fuse back in fire it up again, then check your timing with a light!;)

[Driftpretty]

I have something for you to try!
go try to start you car normally no pumping or touching the throttle, turn the ignition 3x then turn the key off. remove the fuel pump fuse and crank the engine it should fire immediately but there is no fuel so you know what should happen, then put the fuse back in fire it up again, then check your timing with a light!;)

ill try that out. right now i have an odd theory, since when it sits for more then 6 hours by it self, then i try to start it it backfires once, then nothing im letting it sit for two days then it will run lmao.

[wangan_cruiser]

go sell the car if u cant figure it out.

[Driftpretty]

why would i do that lol i just spent a billion dollars piecing together type x aero again. not selling it this time!

[Casperjay]

Try testing another ecu. Had this happen to me with my ca.

[Driftpretty]

trying to get a hold of one is the problem.. all of my friends offed their 240s so i have no one to test parts with.

[OnTheChip]

Double check the dash plug wiring. sohc wiring is different from dohc. Not sure how you're going to run the sohc tach as it is triggered by the single ignitor signal wire (before the resistor), which is a 12V signal, and the sr ECU tach output is 5V. Probably need to swap to the dohc cluster. Make sure the ignition switch goes to ECU pin 36 and the starter signal goes to pin 34.

[godsmack]

Make sure that you are getting power to the eccs relay. I had this same problem and it would click but the main power was dead so I wasn't getting power to the ecu properly. And that was from one of the connectors that you have to make by where the battery sits.

I was getting spark and fuel but it was batch firing so it kept flooding. Ran a hot wire to the relay and it fired right up. Not saying this is your problem but just something to look into.

How I tested was by unplugging the relay with the key on and tested power. Came up with no power on the switched path but power for the resistor to close relay properly.

[Driftpretty]

got it! I know i said it wasnt..but turns out someone in my shop is an asshole and must of touched my timing.. was 180 out. sorry for being a prick. thought i could trust my friends not to mess with my stuff out of spite.