|
Engine Tech Technical discussion related to all relevant engines such as KA, SR, RB, CA, 2JZ , L24/26/28, VG, VQ, and LSx series. |
|
Thread Tools | Display Modes |
03-14-2019, 06:48 AM | #1 |
Leaky Injector
Join Date: Feb 2018
Location: Cincinnati Ohio
Posts: 52
Trader Rating: (1)
Feedback Score: 1 reviews
|
Built SR20 blacktop holding itself at 5k RPM
Drove car for a 2 days after getting it out of the garage on a nice day for first time since winter. 3rd day of driving while heading to the car started idling at 2.2-2600 rpm, hunting. Limped it home and checked TPS voltage which was good. Checked maf by unplugging and car wanted to die so figured that was good. After a while of testing it went away and I took it for a spin in the neighborhood. This is when things went awful, car now revs to 5k regardless of throttle input. Ordered a new IACV gasket which is what I’ll pull and clean and test next, ordered an CTS aswell. Not finding any vacuum leaks. Any other suggestions? Am I clearly missing something?Mod list here
* S13 SR20DET Black top * Block machined by D&D Engines * 86.5mm CP Pistons * Manley rods * King main and rod bearings * Tomei oil pan * ARP headstuds * Tomei headgasket * Brian Crower 272 cams * New Springs and retainers * New Rocker arm stoppers * New timing chain * New chain tensioner * Tomei 740cc injectors * Walboro fuel pump * Greedy style intake manifold * ISR FMIC kit * Flex-a-life dual fans * Tomei exhaust manifold * Garrett GTX2867r turbo Nismotronic tuned. Car has run great for some 8k+ miles now. Drove it all last season. Last edited by J_raw; 03-14-2019 at 08:56 AM.. |
Sponsored Links |
03-14-2019, 07:51 AM | #2 |
Nissanaholic!
|
check voltage of tps and also try adjusting the iacv and see if idle changes...additionally check for leaking injectors and vacuum leaks...looks like good fun build to me!
|
03-14-2019, 10:40 AM | #3 |
Premium Member
Join Date: Jun 2003
Location: torrance, ca
Age: 42
Posts: 12,684
Trader Rating: (130)
Feedback Score: 130 reviews
|
do not start your engine.
pull your charge piping and look at the throttle plate. its super common for the pin to crack and the screw(s) to fall out. the screw can then get sucked in to the intake manifold and fuck shit up on its way out. |
03-14-2019, 12:38 PM | #5 |
Premium Member
Join Date: Jun 2003
Location: torrance, ca
Age: 42
Posts: 12,684
Trader Rating: (130)
Feedback Score: 130 reviews
|
On mine we removed one screw and welded the hole, then removed the other screw and welded up the hole. You could prob remove both screws at the same time but we did it this way just to be cautious and make sure the Plate didn’t move.
|
03-14-2019, 12:47 PM | #8 |
Premium Member
Join Date: Jun 2003
Location: torrance, ca
Age: 42
Posts: 12,684
Trader Rating: (130)
Feedback Score: 130 reviews
|
Yeah it happened to me at a drift event. I was off throttle and all the sudden revs went to redline. Shut the car off. Came to a stop. Started it up and revs went straight to redline again. Shut it off and pushed into the pits. Checked everything, throttle cable and linkage we’re fine, no blown hoses. Pulled the coupler off the throttle body and the screw was just sitting there, in front of the plate. SO SO fortunate it didn’t get sucked in. One of my friends had the same thing happen a few months after, except he sucked the screw in and it wrecked cyl 4 on a freshly built engine.
|
03-14-2019, 02:49 PM | #9 | |
Zilvia FREAK!
Join Date: Nov 2010
Location: arizona
Age: 36
Posts: 1,521
Trader Rating: (1)
Feedback Score: 1 reviews
|
Quote:
Happened on my first SR. I was at the drag strip and it started making the worst sound after a run. Basically crushed the bolt into little pieces between my piston and cylinder head.
__________________
Z32 with lq4 swap Desert Street Scene || Dssevents.com |
|
03-14-2019, 05:11 PM | #10 |
Leaky Injector
Join Date: Feb 2018
Location: Cincinnati Ohio
Posts: 52
Trader Rating: (1)
Feedback Score: 1 reviews
|
Update: Throttle plate screws are tight and have not come loose and no obstruction inside throttle body. Removed and clean IACV waiting on gasket to arrive from enjuku. Will have a buddy help test for leaking injectors this weekend. Always open to suggestions until then.
|
03-15-2019, 12:14 AM | #11 | |
Premium Member
Join Date: Jun 2003
Location: torrance, ca
Age: 42
Posts: 12,684
Trader Rating: (130)
Feedback Score: 130 reviews
|
Quote:
It’s not so much an issue of the screw just backing out on its own. I guess I should have done a better job explaining earlier. |
|
03-15-2019, 12:18 AM | #12 |
Premium Member
Join Date: Jun 2003
Location: torrance, ca
Age: 42
Posts: 12,684
Trader Rating: (130)
Feedback Score: 130 reviews
|
The rod breaks where the red line is drawn. That allows the screw to come loose.
|
03-15-2019, 05:11 AM | #13 | |
Leaky Injector
Join Date: Feb 2018
Location: Cincinnati Ohio
Posts: 52
Trader Rating: (1)
Feedback Score: 1 reviews
|
Quote:
Will do, thank you for the tips and picture! |
|
03-16-2019, 01:15 PM | #14 |
Post Whore!
|
Are you certain you have no intake leaks? Take some carb cleaner and spray around the injectors/manifold halves/TB, basically anywhere excessive air can get drawn in.
__________________
*My SR20VET* Does your VTC gear rattle in your S14/15 SR? PM me. |
03-17-2019, 10:08 AM | #15 |
Post Whore!
|
So to avoid possible damage when it break, you tack the screw to that rod from the direction of your picture?
__________________
Nothing says racecar like a stock car with no interior. |
03-17-2019, 11:04 AM | #16 |
Premium Member
Join Date: Jun 2003
Location: torrance, ca
Age: 42
Posts: 12,684
Trader Rating: (130)
Feedback Score: 130 reviews
|
We removed one of the screws and welded the hole so the rod is now welded directly to the plate, then removed the other screw and did the same thing.
|
Bookmarks |
|
|