Sr Problem. Please help. Suggestions?! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

jdms13sr · 01-15-2010, 04:58 PM

Okay, so I have a s13 sr20det with minimal mods. No internal mods. Been running on the stock t25 turbo for a few months since my t2871 was stolen. The car was running fine this morning and the AEM A/F gauge read perfect. Drove it modestly a few hours ago until I pulled up to a light and the problems began...

Symptoms:

The car began vibrating heavily and rpms dropped to 400 and it felt like the engine was going to die so I gave it a little gas and it steadily idled at 1000 and dropped about 100 rpms gradually every few seconds. 1st gear seemed to be fine besides a slight choppiness and I notice the BOV blew less than normal and second gear ran and boosted fine until about 3000 rpms then it spiked and rev'd to 5000 without any boost or power and the BOV released nothing. 3rd gear was normal and the same thing in 2nd happened in 4th. Running LEAN during boost (or lack there of) according to A/F gauge.

The problem wasnt consistent though and another modest run from 1st to 4th revealed none of the same problems besides being slightly choppy.
It seems as thought I'm getting spurts of boost randomly, but I've experienced shaft play and it feels different although I won't pass that up as a possibility. No white smoke. I get air pressure in pipes to and from intercooler and there doesn't seem to be a leak anywhere.
Its hard to check the BOV since im getting no boost to release.
No holes in intercooler or piping as far as I can tell.
MAF was tested recently and was fine.
Doubt injectors have leak.
Could probably use a timing adjustment, but I don't see that being the problem.
Seems to be running NA half and turbo half.
Dont notice any excess leaks or oil, although, there is a faint oil smell.
The only gauge I have is A/F. No vacuum, boost, etc.
I've checked all I can tonight with little light, so I will inspect more tomorrow, but I'm hoping for more suggestions on what the problem could be.
PLEASE HELP!

traxx07 · 01-15-2010, 09:34 PM

BOV leaking? Or maybe its in the process of killing over. Take vaccum off and see if it does anything. Or just take off the bov being that it may be leaking from there not letting you boost. Just a guess but worth a try.

01-15-2010, 04:58 PM	#1
jdms13sr Join Date: Nov 2009 Location: NC Posts: 37 Trader Rating: (0) Feedback Score: 0 reviews	Sr Problem. Please help. Suggestions?! Okay, so I have a s13 sr20det with minimal mods. No internal mods. Been running on the stock t25 turbo for a few months since my t2871 was stolen. The car was running fine this morning and the AEM A/F gauge read perfect. Drove it modestly a few hours ago until I pulled up to a light and the problems began... Symptoms: The car began vibrating heavily and rpms dropped to 400 and it felt like the engine was going to die so I gave it a little gas and it steadily idled at 1000 and dropped about 100 rpms gradually every few seconds. 1st gear seemed to be fine besides a slight choppiness and I notice the BOV blew less than normal and second gear ran and boosted fine until about 3000 rpms then it spiked and rev'd to 5000 without any boost or power and the BOV released nothing. 3rd gear was normal and the same thing in 2nd happened in 4th. Running LEAN during boost (or lack there of) according to A/F gauge. The problem wasnt consistent though and another modest run from 1st to 4th revealed none of the same problems besides being slightly choppy. It seems as thought I'm getting spurts of boost randomly, but I've experienced shaft play and it feels different although I won't pass that up as a possibility. No white smoke. I get air pressure in pipes to and from intercooler and there doesn't seem to be a leak anywhere. Its hard to check the BOV since im getting no boost to release. No holes in intercooler or piping as far as I can tell. MAF was tested recently and was fine. Doubt injectors have leak. Could probably use a timing adjustment, but I don't see that being the problem. Seems to be running NA half and turbo half. Dont notice any excess leaks or oil, although, there is a faint oil smell. The only gauge I have is A/F. No vacuum, boost, etc. I've checked all I can tonight with little light, so I will inspect more tomorrow, but I'm hoping for more suggestions on what the problem could be. PLEASE HELP!

01-15-2010, 09:34 PM	#2
traxx07 Nissanaholic! Join Date: Dec 2008 Location: San Antonio, TX Age: 35 Posts: 1,988 Trader Rating: (63) Feedback Score: 63 reviews	BOV leaking? Or maybe its in the process of killing over. Take vaccum off and see if it does anything. Or just take off the bov being that it may be leaking from there not letting you boost. Just a guess but worth a try.