my RB20 problems all sorted out

[blk90s13]

well ok i got to the bottom of it

the selnoid on the starter is toast the starter turns over when i jump it straight with out going through the selnoid

so thats that

now it crancks with out catching

meaning its turning and all but wont catch

checked the fuel lines tured out i had lines the way around so i fixed that and went and tried again

same thing wont catch

fuel pump comes on

pullies move motor shakes and every thing seems right

checked ecu for codes

reads 55 which as far as i know is good ?

i even seen some unburned gas out the down pipe and it smells like gas

its driving me nuts being so close with out starting

[Yellow4g63]

try and unplug the MAF and see if it will start.

[NISMObuttnutz]

Also make sure that you have the ignitor chip plugged in good, as well as the grounds, one on top of the ignitor and there is one on the coil packs on the back bolt, make sure those are grounded, to check for spark you can pull the coil packs out and stuff the spark plug in the boot and crank it, you can see if it sparks that way

[NISMO_RB25]

when working on my RB25, I broke a prong off of the solenoid. I removed it and installed the one from the KA and it worked. If yours is shot you might want to see if the one from the KA will fit your RB20.

[blk90s13]

which ka ?

i tried using my SR its diff and the one off my ka is so shot as well it been soaking in oil for a while

oh wait i may heva one laying around

[NISMO_RB25]

1992 KA, but I would be supprised that it would be different. It is a pain to get off, so using and impact screwdriver works best. This worked for the RB25, but I don't know if it will work for your RB20. also I used all of the rb25 parts (the spring and shaft) and just the KA solenoid.

[Carl H]

do you have the green relays plugged in?if not then the car def wont start as the ignitior chip will not be getting any power.

[JonPowell]

I would pull each plug and make sure its getting sprak, that will tell you if its in the CAS, ECU, Ignitor, or coil packs...if you ARE getting spark on all 6, and you smell fuel, then I would start adjusting timing until it catches...if THAT doesnt work, you have a compression problem of some sorts....

If you got spark, and you got air, and you got fuel, it isnt that hard to make fire.....just gotta get it timed right to make it run....

You have my numbers, call me if you need anything!

[blk90s13]

do you have the green relays plugged in?if not then the car def wont start as the ignitior chip will not be getting any power.

green relays ?

wth is the green relays ?

[Yellow4g63]

THey are on the engine harness. Near the ECU 2 relays are suppose to be there. Without them no powa for ya. didn't you see then when you were fishing the harness into the car? I think it's not too far behinde the 2 dash plugs on the RB20 harness or after them I forget.

[blk90s13]

haha they are not pluged

i took them off the clip to thread the harness out and never put them back

wut size are they like the omh ? i have a bucket full of relays

[Yellow4g63]

Don't know they are green tho what ever nissan sets the green ones for.

[blk90s13]

oh ok so they go by color i guess any green nissan relay would be the same

cool will do that tonight and hope it starts then

will let you all know wut happen tonight

[bobdhead39]

let me know how that line holds up....

[blk90s13]

ITS ALIVE

i started it up today got it on video will load it up in a couple days

very rough idel tho and only 500 rpm pulled the plugs out turned out the #1 cylinder plug was soaked in gas

will get me some new plugs and take itfrom there

the green relays solved my problem tho good it wasnt any thing major

well so far

hey daren i will let u know once i put some power steering in and drive it

[bobdhead39]

Good Job, Glad to hear you got it going.

[blk90s13]

got new plugs changed them and thought my problems will be over

well guess not

it runs so rough starts up right way idles at like 600 then keeps dropping till it dies on its own

i rewired the mafs thinking it may be it same ****

wut did u do with the sealed wire that goes around the two signal maf wires ?

no vacum leaks no intercooler leaks

the multi checker that came hooked on the harness reads 25 deg timing at 500 rpm is that normal ?

if i rev it it revs with some kind of bug once i let go gas it shuts off

[Yellow4g63]

I extend my maf wires with shielded wires from my KA harness. Do you have all the vacume hoses on the motor? I think there is a little one under the Throttle body that needs to be pluged too. Dose it idle ok with the MAF unpluged? well by ok I mean it jumps to like 2k and stays there with out running way rich to make u pass out?

[JonPowell]

Reset your timing, I believe that 15 degrees is where it should be...the only problem is that you need it at operating temp to do it, so you gotta baby it till it gets up to temp.

15 degrees is the timing for the RB25 I believe, but I am not 100% sure it is the same on the RB20. Someone correct me if I am wrong.

[blk90s13]

i didnt really wanna mess with timing cuz i know i have cam geras tuned ecu upgraded turbo who knows wut on the internals

so i think this is the way it should stay

checked each and every ground vacum and all hooked / wired

there is a couple of plugs that are loose

a two wire plug that seems to come off a sensor under the intake mani actualy 2 plugs one is kind meduim size with a white/blu and black/yellow wire and the other have two very thin wires and the plug does not have any wires sticking out of the other side

[JonPowell]

The one under the intake mani may be the IAC Idle air control valve....if you have no power there, you are getting hardly any air at all when the throttle plate is closed. there should be a hose coming off the intake pipe going to the valve under the mani, make sure that SOMETHING is plugged into it.

[blk90s13]

http://membres.lycos.fr/pandawerx/rb20.AVI

notice at like 3k or so it have a backfire

also it shuts off on its own after i let go throttle

[Yellow4g63]

Thats how mine sounded when my IC pipe blew off and I didn't know it. ran really rich and wouldn't rev would act like it's hitting limiter. The air that was comming into the engine was been metered my the MAF so it ran like crap.

[blk90s13]

found a couple weird looking things

should this be plugged ?



why is this plugged ?



that plug got two wires on it one is light blue and one is black the plug does not seem to go any where



this plug as well have two wires one is black yellow one is white ( if i remeber right ) and it have both sides of the plug on eiwh out wires coming out the other side ?



another plug with two wires that does not belong any where



nothing is used out this plug so i took it off all together



if u have any input let me know

hoses are all connected i crimped down on all hoses while car running to see if it would change nothing happen

i even did both thr fuel lines too nothing changed

ic pipes are all tight as it may seem

think intercooler maybe leaking ?

but it have no hits dents at all

the mafs bad ? it does not change any thing if i unplug it while car running

[JonPowell]

try putting the ECU in diagnostics mode and see what that gives you....55 is all clear.

[blk90s13]

yeah i did that already its 55

i have tested the ECU almost 10 times man every time i run it and it shuts off i diagn the ecu and 55 is it

[JonPowell]

so you know its not a sensor or wiring problem...gotta be something else stupid...Did you get the new plugs yet?

[blk90s13]

plugs are in and good i pulled them out three times after i started it to monitor if any thing leaking on them

they got some gas on them thats about it

i know its some thing really stupid and thats wut drives me insane looking at it all night

[JonPowell]

I know the feeling!

[blk90s13]

wut numbers matter on the mafs ?

the log top number or the bottom number ?

my mafs look the same and have the same long top number as the Z32 mafs i had on my SR

is this a rb20det mafs here ? with the green sticker the one came on my clip is orange sticker