s13 turns over but will not crank..need some good help.

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s13_240_rb20
Posts: 539
Joined: Wed Jan 23, 2008 4:28 am
Car: 1990 240sx RB20DET

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Here is a summary of my setup:

Car: 1990 240sx hatchMotor: 1993 R32 GTS-T Skyline RB20DET w/trans & ecuFuel Pump: Bosch 040Extras: Nismo FPR, Glowshift Fuel Pressure Gauge & A/F Ratio Gauge

Problem:

Car will turn over but won't attempt to start!! There never seems to be even an attempt to start..just turns over. My FP gauge holds steady at 38psi even while cranking (so FP is good, right?). A/F Ratio Gauge bounces in the "Optimal" range when turning over (so good, right?) I have checked several times, and the ecu is throwing NOOO codes.

Overall, I am at a loss. It's been over a year since I drove this car on the street. When I did, it would hit around 145 EASY (I can only guess since the 240 dash only shows 1.5 inches past 115mph). I have heard several things to check (most of which I don't know how to). I already have the FSM for this motor.

I am working on getting the Consult cable and Datascan 1.3 from eBay, but I can't expect it to help me diagnose a car that won't even start and idle. In the past, it has started a couple of times and would bog out around 15mph (NOOOO....it is not the ECU safe-mode. I've experienced that before and this is different. This is a bog/choke and not a "limiter" kicking in).

And as I have searched, I've run across some of the following suggestions:

ECCS Relay: Haven't looked up how to check yet.Crankshaft sensor on transmission: Can't find in the FSM. Is this the plug that is 8" from the speed sensor.fuel pump: That's not it (according to FP gauge)Bad Battery: I rotate 2 brand new batteries between my cars to keep it charged.Timing: I am too scared to ask what this task entails...some (major to me) disassembly??Distributor adjustment: Can't find "Distributor" in the FSM..does mine even have one, since I have coilpacks and such??etc, etc, etc...

So....can anyone tell me anything to check and HOW to check it (details??) I am a "backyard mechanic" so my experience is limited.

Someone please help me get my Nissan running again. Although my JDM H22A Prelude is fun in the 0-60, it will never compare to my 3 months of driving this Nissan (acceleration OR topend)!!!!!

Thanks,

--TJ


User avatar
slo_coupe
Posts: 436
Joined: Sun Nov 12, 2006 12:38 pm
Car: 90 240sx fastback

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check to make sure your getting optimal spark and fuel

User avatar
s13_240_rb20
Posts: 539
Joined: Wed Jan 23, 2008 4:28 am
Car: 1990 240sx RB20DET

Post

slo_coupe wrote:check to make sure your getting optimal spark and fuel
How do I do that? I am holding 38 psi even during cranking, but I don't know how to make sure my injectors are pumping it right or how to make sure my packs/plugs are working precisely how they should..

--TJ

User avatar
slo_coupe
Posts: 436
Joined: Sun Nov 12, 2006 12:38 pm
Car: 90 240sx fastback

Post

after cranking you could pull a plug or 2 and see if fuel is in the cylinder if so you got fuel. while the plugs are check to see if they are fouled out, if so replace them.to check for spark at your coilpack you can use a spark tester

User avatar
s13_240_rb20
Posts: 539
Joined: Wed Jan 23, 2008 4:28 am
Car: 1990 240sx RB20DET

Post

slo_coupe wrote:after cranking you could pull a plug or 2 and see if fuel is in the cylinder if so you got fuel. while the plugs are check to see if they are fouled out, if so replace them.to check for spark at your coilpack you can use a spark tester
Ok...pulled a couple plugs. They are blackened and soaked in fuel...so...fuel getting there (38psi, steady), and each of the two spark plugs arcs over to the alum...good, ya?? I'll either clean them or change them before continuing any further.

I put the coilpacks back in without the plugs and turned the key to test compression. I am guessing that my compression is good because it popped both the coilpacks out from the pressure (while cranking).

Also, I used a test light on the two wires marked IGN and IGN relay, and they both have voltage present with the key on. I found a 2-wire plug (6" wires) hanging from the bottom of the engine bay fuse box (one wire is GREEN and the other is GREEN with a RED stripe and the plug is RED). I can't seem to find anywhere for this plug to match up to. I also found a 6" ground wire hanging from the fuse box (must've undid it at some time) but I regrounded it to the battery and nothing changed.

I tested continuity between the two pins on the TPS (the top one, pointing to the driver's side) sensor itself, and got no resistance so I am having my suspicions about that, but the ecu throws NOO codes and my consult software should check that, right?? It will be in by next week..

But all-in-all, I'm still confused and just finding more maintenance. I am almost ready to pull out all my wiring and rewire it one at a time (even though it ran for 3 months and I never changed anything before it died).

--TJ


User avatar
slo_coupe
Posts: 436
Joined: Sun Nov 12, 2006 12:38 pm
Car: 90 240sx fastback

Post

clean or replaced your plugs. you can use some brake clean to clean them off. pop them back in and try again...... if that dont work check your timing and the position of your CAS

User avatar
s13_240_rb20
Posts: 539
Joined: Wed Jan 23, 2008 4:28 am
Car: 1990 240sx RB20DET

Post

s13_240_rb20 wrote:Here is a summary of my setup:

Car: 1990 240sx hatchMotor: 1993 R32 GTS-T Skyline RB20DET w/trans & ecuFuel Pump: Bosch 040Extras: Nismo FPR, Glowshift Fuel Pressure Gauge & A/F Ratio Gauge

Problem:

Car will turn over but won't attempt to start!! There never seems to be even an attempt to start..just turns over. My FP gauge holds steady at 38psi even while cranking (so FP is good, right?). A/F Ratio Gauge bounces in the "Optimal" range when turning over (so good, right?) I have checked several times, and the ecu is throwing NOOO codes.

Overall, I am at a loss. It's been over a year since I drove this car on the street. When I did, it would hit around 145 EASY (I can only guess since the 240 dash only shows 1.5 inches past 115mph). I have heard several things to check (most of which I don't know how to). I already have the FSM for this motor.

I am working on getting the Consult cable and Datascan 1.3 from eBay, but I can't expect it to help me diagnose a car that won't even start and idle. In the past, it has started a couple of times and would bog out around 15mph (NOOOO....it is not the ECU safe-mode. I've experienced that before and this is different. This is a bog/choke and not a "limiter" kicking in).

And as I have searched, I've run across some of the following suggestions:

ECCS Relay: Haven't looked up how to check yet.Crankshaft sensor on transmission: Can't find in the FSM. Is this the plug that is 8" from the speed sensor.fuel pump: That's not it (according to FP gauge)Bad Battery: I rotate 2 brand new batteries between my cars to keep it charged.Timing: I am too scared to ask what this task entails...some (major to me) disassembly??Distributor adjustment: Can't find "Distributor" in the FSM..does mine even have one, since I have coilpacks and such??etc, etc, etc...

So....can anyone tell me anything to check and HOW to check it (details??) I am a "backyard mechanic" so my experience is limited.

Someone please help me get my Nissan running again. Although my JDM H22A Prelude is fun in the 0-60, it will never compare to my 3 months of driving this Nissan (acceleration OR topend)!!!!!

Thanks,

--TJ
add this to all those similar suggestions : knock sensor. (since mine will rarely ever start and will crap out on me if I rev too high), but mine is throwing NO codes.???

Re: Can anyone figure this out??? '96 Maxima keeps cutting off!! ... (psalm8612)
psalm8612 wrote:My Maxima will start and idle, but if you try accelerate it will cut off. It is throwing a KS code..........You can even put it in drive or reverse but if you try to accelerate it will cut off. The problem has gradually gotten worse. Can anyone help please?


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