Rebuilt top end of my sr20det, now won't start! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

VisionRx7 · 10-01-2004, 11:59 PM

Ok, I just got this 89 240sx with an sr20det installed. The guy that owned it before me broke off 5 out of 8 of the exhaust mani studs and didn't tell me about it. He covered it up with gasket sealer! The gasket searler didn't last the 10 hour ride home from buying it. After 4 days the leak was so bad the turbo would barely spool! I pulled the head and have it machined, pressure checked, and hot tanked. I put eveything back in with a new metal headgasket, apr head bolts, etc... I started it up and the timing was way off. The car wouldn't run unless I had my foot on the gas. It stalled out and wouldn't start again. I came home and read up on how to properly time the sr20, then went back to the garage. When I went to pull my cam angle sensor out, I noticed that the harness wasn't actually cliped on, so I figured that thats the reason that it stalled. I set the timing according to how the fsm says to. While the cam angle sensor was out of the car, I bumped it and it fell on the cement floor of my garage

. Now the car still won't start! I went over evey bolt and harness like 10 times now and can't figure it out! Did I maybe break the CAS when I knocked it on the ground, or is my problem more serious than that? Any ideas?
Thanks for your help,
Jesse

sr240mike · 10-02-2004, 01:31 AM

Is the ecu throwing any codes when you run the diagnostic?

VisionRx7 · 10-02-2004, 06:42 AM

I didn't use a scan tool on anything on the ecu yet, but the check engine light isn't on.

90sr · 10-02-2004, 09:53 AM

well the cas is wat tells the ecu to tell the coils to fire, you said the plug was on wrong? if thats the case try to put it on the opposite way, also check all the teeth on it make sure nothin is chipped or ne thing cuz u dont want that messin with ur exhaust gears n wat not inside the block, see if your gettin spark, pull all the plugs out n test em 1 by one, get a volt meter and see if the cas actually has voltage, the fsm should tell u wat each prong should be, i think between prong 1 and 2 the voltage should fluctuate between 5 volts n .1volts, also have it grounded, but might need a schematic cuz its gona fluctuate really fast i dont think the volt meter can handle it, um other than that, make sure theres no bites in your harness anywhere, pull your injectors make sure your sprayin, other than that i duno lete me know how it goes, i hope this helps.

chris

VisionRx7 · 10-02-2004, 04:50 PM

Alright, I'll have to try all that. The plug is in the CAS the correct way, but I think I might have broken it since I dropped it. How fragle is the CAS? It did run at first until the plug lost contact because it wasn't clicked in all the way. After that I timed it, and thats when I found out it wouldn't start again. I don't think anything else would have gone bad by timing it, because that was teh only sensor I had to remove.
It is getting spark, but it was really weak looking.

90sr · 10-02-2004, 05:21 PM

well its really a fragile piece to your motor, might be getting bad ground, i mean are all the prongs still in good shape on the piece itself, also inspect all the teeth on it other than maybe sumtin inside the actual sensor got messed up when it fell i dunno, chekc it all out.

chris

Steeles · 10-03-2004, 09:37 PM

my guess is the dropping of the cas is your problem.

lotusdrift · 10-04-2004, 10:11 AM

I think you broke your CAS.

90sr · 10-04-2004, 10:20 AM

yah call heavythrottle or sumthin ask for jeff see if he can get one for you, cuz thats my guess, i mean without that pulse off the cas to the ecu itll never fire. good luck

chris

VisionRx7 · 10-06-2004, 08:56 AM

Thanks! I'll give them a call today.

VisionRx7 · 11-07-2004, 09:21 PM

Its been a few weeks, I guess I should've update this... Turned out it was the CAS. I put the new one in and she fired right up! Thanks for you help!

10-01-2004, 11:59 PM	#1
VisionRx7 Leaky Injector Join Date: Aug 2004 Location: Pittsburgh, PA Age: 42 Posts: 78 Trader Rating: (0) Feedback Score: 0 reviews	Rebuilt top end of my sr20det, now won't start! Ok, I just got this 89 240sx with an sr20det installed. The guy that owned it before me broke off 5 out of 8 of the exhaust mani studs and didn't tell me about it. He covered it up with gasket sealer! The gasket searler didn't last the 10 hour ride home from buying it. After 4 days the leak was so bad the turbo would barely spool! I pulled the head and have it machined, pressure checked, and hot tanked. I put eveything back in with a new metal headgasket, apr head bolts, etc... I started it up and the timing was way off. The car wouldn't run unless I had my foot on the gas. It stalled out and wouldn't start again. I came home and read up on how to properly time the sr20, then went back to the garage. When I went to pull my cam angle sensor out, I noticed that the harness wasn't actually cliped on, so I figured that thats the reason that it stalled. I set the timing according to how the fsm says to. While the cam angle sensor was out of the car, I bumped it and it fell on the cement floor of my garage . Now the car still won't start! I went over evey bolt and harness like 10 times now and can't figure it out! Did I maybe break the CAS when I knocked it on the ground, or is my problem more serious than that? Any ideas? Thanks for your help, Jesse

10-02-2004, 01:31 AM	#2
sr240mike Zilvia FREAK! Join Date: Apr 2004 Location: California, Norcal biiaatch Posts: 1,185 Trader Rating: (0) Feedback Score: 0 reviews	Is the ecu throwing any codes when you run the diagnostic? __________________ TWO IN THE COOT, ONE IN THE POOT

10-02-2004, 06:42 AM	#3
VisionRx7 Leaky Injector Join Date: Aug 2004 Location: Pittsburgh, PA Age: 42 Posts: 78 Trader Rating: (0) Feedback Score: 0 reviews	I didn't use a scan tool on anything on the ecu yet, but the check engine light isn't on. __________________ VisionSpeedFactory.com 1993 Mazda Rx7 - 3 Rotor single turbo

10-02-2004, 09:53 AM	#4
90sr Zilvia Member Join Date: Dec 2003 Location: toms river, new jersey Age: 40 Posts: 200 Trader Rating: (0) Feedback Score: 0 reviews	well the cas is wat tells the ecu to tell the coils to fire, you said the plug was on wrong? if thats the case try to put it on the opposite way, also check all the teeth on it make sure nothin is chipped or ne thing cuz u dont want that messin with ur exhaust gears n wat not inside the block, see if your gettin spark, pull all the plugs out n test em 1 by one, get a volt meter and see if the cas actually has voltage, the fsm should tell u wat each prong should be, i think between prong 1 and 2 the voltage should fluctuate between 5 volts n .1volts, also have it grounded, but might need a schematic cuz its gona fluctuate really fast i dont think the volt meter can handle it, um other than that, make sure theres no bites in your harness anywhere, pull your injectors make sure your sprayin, other than that i duno lete me know how it goes, i hope this helps. chris __________________ chris's sr

10-02-2004, 04:50 PM	#5
VisionRx7 Leaky Injector Join Date: Aug 2004 Location: Pittsburgh, PA Age: 42 Posts: 78 Trader Rating: (0) Feedback Score: 0 reviews	Alright, I'll have to try all that. The plug is in the CAS the correct way, but I think I might have broken it since I dropped it. How fragle is the CAS? It did run at first until the plug lost contact because it wasn't clicked in all the way. After that I timed it, and thats when I found out it wouldn't start again. I don't think anything else would have gone bad by timing it, because that was teh only sensor I had to remove. It is getting spark, but it was really weak looking. __________________ VisionSpeedFactory.com 1993 Mazda Rx7 - 3 Rotor single turbo

10-02-2004, 05:21 PM	#6
90sr Zilvia Member Join Date: Dec 2003 Location: toms river, new jersey Age: 40 Posts: 200 Trader Rating: (0) Feedback Score: 0 reviews	well its really a fragile piece to your motor, might be getting bad ground, i mean are all the prongs still in good shape on the piece itself, also inspect all the teeth on it other than maybe sumtin inside the actual sensor got messed up when it fell i dunno, chekc it all out. chris __________________ chris's sr

10-03-2004, 09:37 PM	#7
Steeles Post Whore! Join Date: Sep 2002 Location: 7th layer of hell, special pit of anger Age: 49 Posts: 3,785 Trader Rating: (0) Feedback Score: 0 reviews	my guess is the dropping of the cas is your problem. __________________ Keeping it Godzira bishes. So I murdered another turbo

10-04-2004, 10:11 AM	#8
lotusdrift Zilvia Member Join Date: Jul 2003 Location: norfolk va Age: 44 Posts: 211 Trader Rating: (0) Feedback Score: 0 reviews	I think you broke your CAS.

10-04-2004, 10:20 AM	#9
90sr Zilvia Member Join Date: Dec 2003 Location: toms river, new jersey Age: 40 Posts: 200 Trader Rating: (0) Feedback Score: 0 reviews	yah call heavythrottle or sumthin ask for jeff see if he can get one for you, cuz thats my guess, i mean without that pulse off the cas to the ecu itll never fire. good luck chris __________________ chris's sr

10-06-2004, 08:56 AM	#10
VisionRx7 Leaky Injector Join Date: Aug 2004 Location: Pittsburgh, PA Age: 42 Posts: 78 Trader Rating: (0) Feedback Score: 0 reviews	Thanks! I'll give them a call today. __________________ VisionSpeedFactory.com 1993 Mazda Rx7 - 3 Rotor single turbo

11-07-2004, 09:21 PM	#11
VisionRx7 Leaky Injector Join Date: Aug 2004 Location: Pittsburgh, PA Age: 42 Posts: 78 Trader Rating: (0) Feedback Score: 0 reviews	Its been a few weeks, I guess I should've update this... Turned out it was the CAS. I put the new one in and she fired right up! Thanks for you help! __________________ VisionSpeedFactory.com 1993 Mazda Rx7 - 3 Rotor single turbo