# SR20 guys need your help!! **URL:** \ **Category:** SON240sx Automotive\ **Created:** [June 3, 2013, 2:49pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988 "2013-06-03T14:49:02Z")\ **Posts on this page:** 17\ **Page:** 3
**Author:** ![BCHLR240SX](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bchlr240sx/32/5754_2.png) [@BCHLR240SX](https://forums.speedlife.net/u/BCHLR240SX)\ **Post date:** [July 18, 2013, 5:58pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/41 "2013-07-18T17:58:40Z")
Try using one of the diagnostic flow charts in the fsm, I think I saw one in there for you issue. Use the s14 sr obviously, unless you’re hella jdm and can read japanese lol ---
**Author:** ![derass](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/derass/32/5691_2.png) [@derass](https://forums.speedlife.net/u/derass)\ **Post date:** [July 18, 2013, 9:04pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/42 "2013-07-18T21:04:58Z")
> [@randy240sx](#): > > why would the fuel pressure progressively get worse if its simply just a clog or a kinked line? as the rpm’s increase, the injector open times increase. if the pump and lines are not providing the rail with enough volume, the pressure at the rail will decrease. ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [July 19, 2013, 7:33am UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/43 "2013-07-19T07:33:10Z")
> [@Steve660](#): > > bad alternator? This should have been a question asked very early in your thread but whats your voltage at when it starts to bog. I had an ecu relay go one year so the ecu was only running on 9-10 volts, this made the ecu run in limt I think but the car drove like shit. If your ecu is getting below 12 volts I would think it would mess with how the car runs. the alternator was reading 14.6 volts when the engine was cold but I didnt check when it started to bog… ill keep that in mind for the weekend thnx ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [July 20, 2013, 10:59am UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/44 "2013-07-20T10:59:46Z")
So I checked the voltage with the battery hooked up when the engine was hot and starting to bog it was reading 13.3 so I’m guessing my alternator is fine, I’m open to more suggestions ☹ ---
**Author:** ![G-E](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/g-e/32/5546_2.png) [@G-E](https://forums.speedlife.net/u/G-E)\ **Post date:** [July 20, 2013, 5:33pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/45 "2013-07-20T17:33:53Z")
White smoke might mean hg leak ? If it’s just a little bit, that would cause overheating AND sputtering ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [July 22, 2013, 7:20am UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/46 "2013-07-22T07:20:53Z")
No smoke at all… Suggesting to me that it could be a fuel issue I read earlier the fuel pump relay or EGI relay can cause the same problem ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [July 22, 2013, 2:36pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/47 "2013-07-22T14:36:58Z")
Does anyone know the correct voltage for the fuel pump wires? yellow/green reads 12.3v purple white reads .17v blue/red reads 1.4v And I can’t read anything on the solid yellow I’m not sure what the correct voltages are[COLOR=“Silver”] Correction purple/white reads -12.45 Changed the EGI Relay… same shit Deff a fuel problem on the highway accelerating opening the throtle wide open the engine wants to die, so im running way too lean… going to change the fuel filter again even though it is only 2 years old but I did change my gas tank a year ago… and swap out the o rings on the injectors as well ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [July 23, 2013, 9:52am UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/48 "2013-07-23T09:52:59Z")
Little update just bypassed the fuel filter and still no luck… im going crazy! ---
**Author:** ![G-E](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/g-e/32/5546_2.png) [@G-E](https://forums.speedlife.net/u/G-E)\ **Post date:** [July 24, 2013, 4:46pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/49 "2013-07-24T16:46:39Z")
What’s the fuel pressure do when idling and revving, did you install a mechanical gauge yet? ---
**Author:** ![240pimp](https://avatars.discourse-cdn.com/v4/letter/2/848f3c/32.png) [@240pimp](https://forums.speedlife.net/u/240pimp)\ **Post date:** [July 24, 2013, 7:50pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/50 "2013-07-24T19:50:21Z")
Did you check the throttle position sensor? ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [July 25, 2013, 7:20am UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/51 "2013-07-25T07:20:21Z")
> [@G-E](#): > > What’s the fuel pressure do when idling and revving, did you install a mechanical gauge yet? did not do that yet, im letting a guy look at it this weekend im almost certain it the power to the fuel pump, either bad wiring or shitty ground, when I put a jumper cable on with a different car running the SR starts up ---
**Author:** ![crud](https://avatars.discourse-cdn.com/v4/letter/c/3bc359/32.png) [@crud](https://forums.speedlife.net/u/crud)\ **Post date:** [July 27, 2013, 9:51am UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/52 "2013-07-27T09:51:53Z")
hi RANDY ! I had this problem and it drove me nuts .car is fine for 15 to 20 minutes then bluur! I checked this and that and no luck. then I called PUR AUTOMOTIVE told them the symtoms.dropped in for appointment . The car is now running a Audi RS4 ignition system with nooo igniter chip . all I can say is WOW! ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [August 2, 2013, 7:15am UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/53 "2013-08-02T07:15:29Z")
brought my car in to a shop i’ll keep you guys informed when i find out what the issue is! ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [August 3, 2013, 1:23pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/54 "2013-08-03T13:23:04Z")
So I brought my car to Eric Anderson’s shop and we are getting closer to the issue! After swapping the ECU the car ran orbit still had the same issue, when I have back the loaner ECU to my buddy Kevin Talbot he couldn’t get his car started! Turns out my car burnt out the fuel chip in his ECU his car wouldn’t prime… I couldn’t believe that my car broke the ECU so I put Kevin’s back in and my car fired right up!!! SO WHAT THE HELL IS GOING ON! After we took Kevin’s ECU in another car with a Redtop… Same issue no priming… So my car deff messed up the ECU! We then realized my fuel power can run without the ECU and the way the wiring is its blowing whatever fuel related in other ECUs! The wiring going to the sending unit is a mess so first step is going to be rewiring from the fuel pump relay to the pump and go from there Fingers crossed :S ---
**Author:** ![crud](https://avatars.discourse-cdn.com/v4/letter/c/3bc359/32.png) [@crud](https://forums.speedlife.net/u/crud)\ **Post date:** [August 3, 2013, 5:58pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/55 "2013-08-03T17:58:56Z")
hope you get to the issue quikly.these cars can at times frustrate us. ---
**Author:** ![G-E](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/g-e/32/5546_2.png) [@G-E](https://forums.speedlife.net/u/G-E)\ **Post date:** [August 3, 2013, 6:33pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/56 "2013-08-03T18:33:49Z")
Now would be a great time to wire in a switch activated fuel pump relay and separate it from any ecu/ignition components… ---
**Author:** ![randy240sx](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/randy240sx/32/5740_2.png) [@randy240sx](https://forums.speedlife.net/u/randy240sx)\ **Post date:** [September 6, 2013, 3:38pm UTC](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988/57 "2013-09-06T15:38:15Z")
Soo after changing everything that could cause this issue on the SR my buddies father swapped out my CAS and viola problem gone!! Happy, but kinda stressed it took so long and a lot of troubleshooting but she’s back on the road for now and focusing on makin the car look pretty… Btw I did search symptoms to the CAS but it didn’t quite add up or I would have done it sooner! Plus my sending unit kicked the bucket while I was troubleshooting so u can see why I was confused ☹ [Previous page](https://forums.speedlife.net/t/sr20-guys-need-your-help/230988.md?page=2)