S13 Sr20det No Start after replacing HG - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jdmgtom · 02-03-2020, 09:48 AM

Replaced my Head gasket as preventive maintenance. Went with Apexi 1.1mm HG. Took a picture of every ground, sensor and vacuum/fuel hose I unplugged also marked the cam angle sensor and cams. I got everything back together with new plugs, it would crank but not turn over. Fuel pressure would hit 43psi when priming and drop fast when fuel pump stopped priming. I bought new Walboro 255 and installed that with new z32 fuel filter and it fixed that problem and it now holds pressure, I thought that was my issue but it still does not start. I've triple checked timing, I even sent pictures to my tuner Martin of my timing. Everything was exact. I have compression, I feel my exhaust pulsing when it cranks. Triple checked all grounds. Anybody have any ideas on what it might be? Car was running before I took the head off.
Thanks

S14rebuild · 02-03-2020, 11:27 AM

Do u have spark? Do u have injector pulse? Common things to check before posting on the forum....

240msh · 02-03-2020, 01:39 PM

What this guy said^

jdmgtom · 02-03-2020, 04:42 PM

Quote:

Originally Posted by S14rebuild

Do u have spark? Do u have injector pulse? Common things to check before posting on the forum....

I just checked all 4 ignition coils and spark plug one by one for spark and it is sparking. My injectors are new DeatschWerks 550cc, not sure how to test for pulse.. I charged my battery overnight because it started to crank slow. So now I have a fully charged battery and still no start.

S14rebuild · 02-03-2020, 05:45 PM

Use a test light....on one injector one wire will have a 12+ with key on and cranking. The other wire will have a flashing(pulsing) ground - while cranking/running.

Please check and confirm....

jdmgtom · 02-03-2020, 06:12 PM

I just did a compression test...... 100-80-75-90
heads coming back off..

S14rebuild · 02-03-2020, 06:22 PM

Dam, get fukkkkk

Dsmguy1993 · 02-03-2020, 09:36 PM

ooh those compression numbers dont look too good it may be piston rings the top two rings are compression rings. I recommend you re-ring the motor and re-gasket it and it should be good to go sr20det oem rings are pretty inexpensive. You will need silicone to close it back up again but the OEM nissan gasket kit is cheap and comes with nissan orange silicone maker kit.

02-03-2020, 09:48 AM	#1
jdmgtom Zilvia Member Join Date: Aug 2018 Location: St. Petersburg, FL Age: 31 Posts: 151 Trader Rating: (0) Feedback Score: 0 reviews	S13 Sr20det No Start after replacing HG Replaced my Head gasket as preventive maintenance. Went with Apexi 1.1mm HG. Took a picture of every ground, sensor and vacuum/fuel hose I unplugged also marked the cam angle sensor and cams. I got everything back together with new plugs, it would crank but not turn over. Fuel pressure would hit 43psi when priming and drop fast when fuel pump stopped priming. I bought new Walboro 255 and installed that with new z32 fuel filter and it fixed that problem and it now holds pressure, I thought that was my issue but it still does not start. I've triple checked timing, I even sent pictures to my tuner Martin of my timing. Everything was exact. I have compression, I feel my exhaust pulsing when it cranks. Triple checked all grounds. Anybody have any ideas on what it might be? Car was running before I took the head off. Thanks __________________ _________ IG - g_t0m

02-03-2020, 01:39 PM	#3
240msh Zilvia Member Join Date: Oct 2016 Location: Las Vegas Age: 25 Posts: 238 Trader Rating: (1) Feedback Score: 1 reviews	What this guy said^ __________________ @Michayyl

02-03-2020, 06:12 PM	#6
jdmgtom Zilvia Member Join Date: Aug 2018 Location: St. Petersburg, FL Age: 31 Posts: 151 Trader Rating: (0) Feedback Score: 0 reviews	I just did a compression test...... 100-80-75-90 heads coming back off.. __________________ _________ IG - g_t0m

02-03-2020, 11:27 AM	#2
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,495 Trader Rating: (8) Feedback Score: 8 reviews	Do u have spark? Do u have injector pulse? Common things to check before posting on the forum....

02-03-2020, 05:45 PM	#5
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,495 Trader Rating: (8) Feedback Score: 8 reviews	Use a test light....on one injector one wire will have a 12+ with key on and cranking. The other wire will have a flashing(pulsing) ground - while cranking/running. Please check and confirm....

02-03-2020, 06:22 PM	#7
S14rebuild BANNED Join Date: May 2019 Location: Florida-FAIL Posts: 2,495 Trader Rating: (8) Feedback Score: 8 reviews	Dam, get fukkkkk

02-03-2020, 09:36 PM	#8
Dsmguy1993 Leaky Injector Join Date: Aug 2019 Location: Illinois Age: 30 Posts: 135 Trader Rating: (0) Feedback Score: 0 reviews	ooh those compression numbers dont look too good it may be piston rings the top two rings are compression rings. I recommend you re-ring the motor and re-gasket it and it should be good to go sr20det oem rings are pretty inexpensive. You will need silicone to close it back up again but the OEM nissan gasket kit is cheap and comes with nissan orange silicone maker kit.