RB20DET Not Starting

[I build motors all day]

drop the distributor in wrong...?

[nurvcom]

ok

Here my next
thing i going to try

recheck timing
Make shur my CAS is in the right Spot !

harness i kinda confused and dont have anyone to help on that

I know My coils work Fine
I know my injectors work fine
ECU works got 2


here a question
when car is starting red light should stay on? when turning the motor over?


and white with purple wire what wire in fuse box in engine bay should i tap off of? the kid who did this swap taped off the second biggest white wire

[Yellow4g63]

Did u check the coils to see if there is constant power to them with the key on? I think it's the middle pin.

[clark]

i read all of the first page...i don't see any indication of you checking for spark.....you mentioned the injectors are firing and you have fuel PSI.

it sounds like you're not getting spark. pull a spark plug out, plug it back into a coilpack, hold the plug near the valve cover, have a friend crank the engine...

do you see an ARC???

[nurvcom]

Originally Posted by clark

i read all of the first page...i don't see any indication of you checking for spark.....you mentioned the injectors are firing and you have fuel PSI.

it sounds like you're not getting spark. pull a spark plug out, plug it back into a coilpack, hold the plug near the valve cover, have a friend crank the engine...

do you see an ARC???

fuel PSI is good pump it good

i pulled all my coils out and put spark plugs in them and put them on my valve cover and started turning the CAS and watch each 1 fires

[Yellow4g63]

Did u try to reverse the fuel lines?

[nurvcom]

Originally Posted by Yellow4g63

Did u try to reverse the fuel lines?

yep tryed that No luck

[carcrzy920]

okay i dont mean to thread jack but is upper fuel rail feed or return. i just did my motor swap and cant remember if the feed goes to the regulator or not.

[nurvcom]

Originally Posted by carcrzy920

okay i dont mean to thread jack but is upper fuel rail feed or return. i just did my motor swap and cant remember if the feed goes to the regulator or not.

fEED ON TOP AND RETURN ON BOTTEM

[carcrzy920]

thanks. good luck with you rb20.

[Sheldon Rozon]

ok so im having a similar problem with my 89 rb 240. but i dont have spark. now you said you have spark and fuel well if you did then it would start or at least sputter not just crank (like mine). so my questions for you are:
when did you pull the plugs and actually check your spark?
was it during the time period that it would start sometimes?
and you said when it did randomly start it was cold cause it wouldnt start when hot, right?
have you checked the power going through your module?

so you should check spark again, and if you dont have spark anymore then its your ignition module. cause you have the symptoms and those things can go in their sleep. mines done close to the samething and im getting an ignition module in a week or 2.

but if you do have spark then run a code test with the ecu using the led on the back side of the ecu. google rb20det codes and ull get the info you need to do it. it took me 5 mins and helped me rule out and ecu problem.

[Zacho]

Originally Posted by nurvcom

ok check fuel line It hook up right still not starting Took A compression test
Front 6 130psi
Front 5 130psi
Mid 4 130psi
Mid 3 130psi
Rear 2 140psi
Rear 1 140psi

Half Mood (F#$King) Key Broke off cam so now it kinda hard to reinstall cas
and it still not starting

am I the only one here who thinks with a broken half moon on his cam, now its not rotating the CAS and therefore, no dice?

[3v1Ls14]

will still rotate the cas, but it could be inserted one of 10 different ways. 9 of which it wont start at all.

[baube]

tried with maf un-plugged?

[J-tizzel]

Did you ever figure this out, I'm having the same problem. Got fuel and spark but it just pops when cranking.

[Cease_Super_Hicas]

Did u check for any ecu codes? Timing? Tps? Or maf

[simogu]

Originally Posted by nurvcom

YA

ECU red light go's out when cranking car that should stay on? meaning that ecu stay's on

RB20, Super Charge. I pretty much have the same problem, over the course of 6 months, the car was running great, the first thing I notice was sluggish idling, then the car would just die, and would not start for about 1.5 hrs. Once started is would run then die again. same results.
I then started finding vacuum hoses blown right off there connections. I was able to get the car started, then last month then it died again. Now it won't even crank over, no lights or power. My next step is trace all connections from my ECU to motor/ignition. Any advice would be greatly appreciated.

[OrangeVirus1]

Make sure you coil packs aren't cracked up and arching spark on the head. I had that issue and it would never start.

[simogu]

Did you ever get your RB20 starting problem fixed? I have the same kinds of problems.

simogu

[OrangeVirus1]

Originally Posted by simogu

Did you ever get your RB20 starting problem fixed? I have the same kinds of problems.

simogu

yeah, I found out my coils were all sorts of shitty. and my spark plugs too. I had a problem with my wiring harness too.

If you have stuff missing from your wiring harness, I am selling mine.. it's in bad condition but you can use it to fix anything you are missing.

Also I recommend replacing your coil pack harness if you haven't. I found out part of my problem was that the wiring was all cracked up and broken.. Literally when I took it off the whole thing fell apart.

[simogu]

Originally Posted by Cease_Super_Hicas

Did u check for any ecu codes? Timing? Tps? Or maf

Don't have diagnostic, just multi-meter. Checking wiring to ignition coil, looking for cracks and possible arcing.
Any other suggestions are welcome.

Simo

[simogu]

because I have no power, I know the battery is good, just replaced it. No lights, horn, no power. My starting point is the Battery to the Starter, ground may be an issue. I will start there.
Then tracing power to ignition switch and fuse box
ECU might be a problem, I now have the Pin -out list for the ECU, I will need to verify that wiring from there, as well as test for grounding
Any advice is useful....
Thanks, SIMOGU

[OrangeVirus1]

Do you have the relays for the wiring harness?

[simogu]

I will also check my Coil Pack harness for cracks.

Thanks,
SIMOGU

[OrangeVirus1]

Originally Posted by simogu

I will also check my Coil Pack harness for cracks.

Thanks,
SIMOGU

definitely do that. When I was having spark problems, I took my coil harness off and it literally fell apart.. the clips broke into a bunch of pieces.. the wires cracked in half...

[greenwood]

Originally Posted by Zacho

am I the only one here who thinks with a broken half moon on his cam, now its not rotating the CAS and therefore, no dice?

It will still rotate and work fine if you are sure to install it correctly. I had 2 Cas's go bad on me, shaft broke because bracket for cas was slightly bent. Car would still get spark but not enough to fire, but just enough to make me believe the cas was ok. Make sure that this is not the issue.

[greenwood]

If there are cracks on the coils, you can reseal with liquid electrical tape. The car would still run, just like shit it's highly unlikely that all coils are bad. Are the cylinders filling with fuel or not? Is your TPS adjust correctly? Have you tried swapping igniters? Where are you reading the fuel pressure from? Should be 36 at idle, 42 with no vacuum on it. Good luck.

[240drew]

sounds like MAF or grounding also check fuel pressure.

[greenwood]

No, Car would still start with maf unplugged.

[240drew]

if the maf is bad it won't start under some circumstances. Unplug and start to rule that out as an issue. And yes a car will run with maf unplugged if you don't believe me I have a video of my rb20 idling with out one