Sr20det redtop cranks but wont start??? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

viper2003 · 05-23-2005, 03:44 PM

I have just completed my swap, it a sr20det redtop in a 89 240sx fastback.
The wiring harness was sent out to almasi tuning which are pro's for the nissan harnesses. So the wiring is done correctly. All plugs & sensors are connected. And has been verified several times by and other people.

Now the car is just cranking, but doesnt catch. When i first was trying to start it did nothing moved the CAS around and then it started, lasted for like 10secs while me pushing on the gas and it then just died. And it didnt start again because i tried to play with the CAS. I have verified the ECU and it is giving me code 55 which is ok.
No the car is getting fuel, spark and compression.
The fuel lines are connected properlly, the spark plus are NGK v power and gapped at .032 I have seen fuel on the spark plugs if i pull them out.

So then i taught it was fir sure the timing is off. Started researching on the net for how to set the timing properlly. So far i have found and done the following to set the timing:
Pulled of the valve cover, turned the crank pulley to the second notch on from the left on the crank pulley, making sure that the lobes on the camshaft are pointing towards the shock towers and away from each other. And it was at TDC. Then pulled out the CAS and all that and ligned it up properlly put everything back togther and the car doesnt start, it cranks but doesnt catch.

anyone have any ideas what is going on.

s13silady · 05-23-2005, 09:10 PM

maybe a maf problem?

mixedwell · 05-23-2005, 10:01 PM

i agree.... maf problem. but hey, my current project isnt woking again so i dont know! but mafs.... sounds like the right deal.

-

viper2003 · 05-24-2005, 06:39 AM

Quote:

Originally Posted by s13silady

maybe a maf problem?

Wouldnt the ECU give me a code if the MAF was bad???

viper2003 · 05-24-2005, 06:42 AM

Update: i have tried to move the CAS around freely: meaning it is not alligned anymore, but i have found that it is sputtering now the car, it is fighting itself to start. But it still doesnt catch, i had to stop trying because the starter is starting to get too hot. This doesnt make sense the CAS is not ligned up properlly and this is when i get the best results??? this is pretty weird!!!!! Anyways i will try it later today hopefully.

the head · 05-24-2005, 08:22 AM

CAS could be 180 off

viper2003 · 05-24-2005, 09:17 AM

Do you know what i was wondering if it is possible that the wiring for the coilpacks was screwed up, for example if 2 of the packs were switched around for some reason. Is that possible could this be causing my car fron starting? Is there a way for me to test it?

the head · 05-24-2005, 09:28 AM

you can test firing order by pulling out all the plugs and laying them on the valve cover then having a friend crank the motor firing order should be 1324 i think the reason i doubt this is the problem is that no matter how botched it is 1 will still fire so it would most likly run on one cyl

mixedwell · 09-28-2005, 08:44 PM

hey i know this thread seems a little old but i couldnt help but wonder if this guy got his car to sart. heres a suggestion, just in case. the timing on the sr20det was my problem, that and a bad ecu. check first if the ecu is good or not by swapping it out with a friends sr car. also check your timing PROPERLY. alot of peoploe go out of their way to do timing and its not even done correctly. the FSM says you must have the car at TDC, meaning there are two gun metal colored chain links in the head that have to match with these tiny holes on the cams. Theres one for each cam. make sure the colored chain links match the holes. now check on the crack pulley that its on the second notch from the left. somthing like that. the FSM realy helps out.

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05-23-2005, 03:44 PM	#1
viper2003 Join Date: Jul 2004 Location: West island Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	Sr20det redtop cranks but wont start??? I have just completed my swap, it a sr20det redtop in a 89 240sx fastback. The wiring harness was sent out to almasi tuning which are pro's for the nissan harnesses. So the wiring is done correctly. All plugs & sensors are connected. And has been verified several times by and other people. Now the car is just cranking, but doesnt catch. When i first was trying to start it did nothing moved the CAS around and then it started, lasted for like 10secs while me pushing on the gas and it then just died. And it didnt start again because i tried to play with the CAS. I have verified the ECU and it is giving me code 55 which is ok. No the car is getting fuel, spark and compression. The fuel lines are connected properlly, the spark plus are NGK v power and gapped at .032 I have seen fuel on the spark plugs if i pull them out. So then i taught it was fir sure the timing is off. Started researching on the net for how to set the timing properlly. So far i have found and done the following to set the timing: Pulled of the valve cover, turned the crank pulley to the second notch on from the left on the crank pulley, making sure that the lobes on the camshaft are pointing towards the shock towers and away from each other. And it was at TDC. Then pulled out the CAS and all that and ligned it up properlly put everything back togther and the car doesnt start, it cranks but doesnt catch. anyone have any ideas what is going on.

05-23-2005, 09:10 PM	#2
s13silady Nissanaholic! Join Date: May 2002 Location: Bay Area, San Jose Posts: 1,804 Trader Rating: (0) Feedback Score: 0 reviews	maybe a maf problem? __________________

05-23-2005, 10:01 PM	#3
mixedwell Zilvia Addict Join Date: Sep 2002 Location: SOuth Cali Posts: 892 Trader Rating: (0) Feedback Score: 0 reviews	i agree.... maf problem. but hey, my current project isnt woking again so i dont know! but mafs.... sounds like the right deal. - __________________ silvia... my love ::

05-24-2005, 08:22 AM	#6
the head Nissanaholic! Join Date: Jul 2002 Location: in a dark room mastering the art of typing with one hand Posts: 2,164 Trader Rating: (3) Feedback Score: 3 reviews	CAS could be 180 off __________________ I never knew you could do that with an eggplant

05-24-2005, 09:28 AM	#8
the head Nissanaholic! Join Date: Jul 2002 Location: in a dark room mastering the art of typing with one hand Posts: 2,164 Trader Rating: (3) Feedback Score: 3 reviews	you can test firing order by pulling out all the plugs and laying them on the valve cover then having a friend crank the motor firing order should be 1324 i think the reason i doubt this is the problem is that no matter how botched it is 1 will still fire so it would most likly run on one cyl __________________ I never knew you could do that with an eggplant

05-24-2005, 06:42 AM	#5
viper2003 Join Date: Jul 2004 Location: West island Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	Update: i have tried to move the CAS around freely: meaning it is not alligned anymore, but i have found that it is sputtering now the car, it is fighting itself to start. But it still doesnt catch, i had to stop trying because the starter is starting to get too hot. This doesnt make sense the CAS is not ligned up properlly and this is when i get the best results??? this is pretty weird!!!!! Anyways i will try it later today hopefully.

05-24-2005, 09:17 AM	#7
viper2003 Join Date: Jul 2004 Location: West island Posts: 7 Trader Rating: (0) Feedback Score: 0 reviews	Do you know what i was wondering if it is possible that the wiring for the coilpacks was screwed up, for example if 2 of the packs were switched around for some reason. Is that possible could this be causing my car fron starting? Is there a way for me to test it?

09-28-2005, 08:44 PM	#9
mixedwell Zilvia Addict Join Date: Sep 2002 Location: SOuth Cali Posts: 892 Trader Rating: (0) Feedback Score: 0 reviews	hey i know this thread seems a little old but i couldnt help but wonder if this guy got his car to sart. heres a suggestion, just in case. the timing on the sr20det was my problem, that and a bad ecu. check first if the ecu is good or not by swapping it out with a friends sr car. also check your timing PROPERLY. alot of peoploe go out of their way to do timing and its not even done correctly. the FSM says you must have the car at TDC, meaning there are two gun metal colored chain links in the head that have to match with these tiny holes on the cams. Theres one for each cam. make sure the colored chain links match the holes. now check on the crack pulley that its on the second notch from the left. somthing like that. the FSM realy helps out. - __________________ silvia... my love ::