# New year, same problems **URL:** \ **Category:** Canada Nissan Automotive\ **Created:** [May 10, 2005, 9:07pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018 "2005-05-10T21:07:59Z")\ **Posts on this page:** 16\ **Page:** 1
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 10, 2005, 9:07pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/1 "2005-05-10T21:07:59Z")
I still have a leak from my gas tank. It leaks at the top seal. The pump holder is in good shape, I used a new seal first, GOOP second and the same seal. The tank side of the seal is in good shape as well. 2nd problem, anybody who has seen my car’s dyno sheets or seen it while on the dyno, noticed my exhaust at WOT was the loudest there. I believe that is from retarded timing at higher rpms. I may be wrong. From my chart I see, a pronounced dip before 5k, with a corresponding catchup a couple hundred rpm later. This is noticeable while driving as well. If you go WOT at 2500rpm you feel boost building but smoothly, more like a wallop. Then you feel the dip then relatively smooth all the way to 7k. Any thought out suggestions on either problem are appreciated. Good news, no cooling problem anymore. ---
**Author:** ![Jay\_Nismo](https://avatars.discourse-cdn.com/v4/letter/j/c37758/32.png) [@Jay\_Nismo](https://forums.speedlife.net/u/Jay_Nismo)\ **Post date:** [May 11, 2005, 12:32am UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/2 "2005-05-11T00:32:32Z")
ya got your Koyo in?? ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 11, 2005, 5:42am UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/3 "2005-05-11T05:42:57Z")
> [@silvia\_180sx\_\_](#): > > ya got your Koyo in?? yes. ---
**Author:** ![Chromedragon](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@Chromedragon](https://forums.speedlife.net/u/Chromedragon)\ **Post date:** [May 11, 2005, 5:50am UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/4 "2005-05-11T05:50:22Z")
Sounds like it would be leaning out and causing the knock sensor to pull some timing around 5k…have you ever run o2 on it? ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 11, 2005, 7:05am UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/5 "2005-05-11T07:05:51Z")
At the dyno there wasn’t an unusually lean condition. The whole rev range looked rich like normal. Although at the dip, the fuel dipped too. ---
**Author:** ![Chromedragon](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@Chromedragon](https://forums.speedlife.net/u/Chromedragon)\ **Post date:** [May 11, 2005, 3:30pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/6 "2005-05-11T15:30:40Z")
The fuel dipped how? As in it leaned out a bit? Are you hitting VTEC? hehe Seriously though, it sounds like the computer is pulling timing. Whether it’s doing it because of the low fuel or the fuel is dropping because of the timing is what you kinda have to figure out. My car actually does something similar, it feels like a little blip just before 3,000rpm. Not really noticeable under full acceleration, but quite noticeable under light to moderate throttle input. Have you tried throwing another computer in to see if it clears it up? ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 11, 2005, 4:56pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/7 "2005-05-11T16:56:21Z")
> [@Chromedragon](#): > > The fuel dipped how? As in it leaned out a bit? Are you hitting VTEC? hehe > > Seriously though, it sounds like the computer is pulling timing. Whether it’s doing it because of the low fuel or the fuel is dropping because of the timing is what you kinda have to figure out. My car actually does something similar, it feels like a little blip just before 3,000rpm. Not really noticeable under full acceleration, but quite noticeable under light to moderate throttle input. > > Have you tried throwing another computer in to see if it clears it up? I have figured the computer was pulling timing, but I haven’t found somebody willing to time the engine on the dyno. Maybe I’ll borrow a gun and it’ll be me. I misinformed you about the fuel. It is about 13:1 at the point of the dip, but the whole fuel curve is a rolling hill down to 12:1. I think it may be knock causing the problem but knock at 5k every run seems strange to me. I’d like to try another computer. I’ll try Aaron’s for an hour if he will let me, or Rob’s considering his isn’t in the car. ---
**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\ **Post date:** [May 11, 2005, 5:19pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/8 "2005-05-11T17:19:10Z")
Let me know if you need mine. It sould be a good test to see if its in working order. During the Dyno day i can only be there for the first bit cuz my after grad party is that night. ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 11, 2005, 8:27pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/9 "2005-05-11T20:27:17Z")
> [@RS13](#): > > Let me know if you need mine. It should be a good test to see if its in working order. During the Dyno day i can only be there for the first bit cuz my after grad party is that night. I’ll try Aaron’s Thursday night and I’ll phone you about yours , over the weekend. Big Garage Sale, everybody! ---
**Author:** ![Chromedragon](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@Chromedragon](https://forums.speedlife.net/u/Chromedragon)\ **Post date:** [May 12, 2005, 8:26pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/10 "2005-05-12T20:26:45Z")
I think that would be a good test. It could just be a hiccup in the fuel map or something…mistake at the factory possibly? ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 13, 2005, 5:35am UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/11 "2005-05-13T05:35:12Z")
> [@Chromedragon](#): > > I think that would be a good test. It could just be a hiccup in the fuel map or something…mistake at the factory possibly? I’m going to drive to work with Aaron’s ECU plugged in today. ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 13, 2005, 8:11pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/12 "2005-05-13T20:11:47Z")
Different ecu, same problems. I will look at the obvious again on Sunday when I have time again. ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 19, 2005, 8:52pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/13 "2005-05-19T20:52:21Z")
swapped the hose to the iac valve and added a screw clamp and threw away the spring clamp, put the timing back close to where I had it last year(it’s about 1 1/8 inch past the 20 degree mark) and it drives beautiful at 7 psi. I’ll get the oil changed and put the boost controller on and fill up for SaTURDAY. ---
**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\ **Post date:** [May 19, 2005, 10:44pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/14 "2005-05-19T22:44:36Z")
Hmmm the cam angle sensor did nor work any better for you?? I will drop by the dyno day on saturday get it back from you. ---
**Author:** ![1mns13](https://avatars.discourse-cdn.com/v4/letter/1/8491ac/32.png) [@1mns13](https://forums.speedlife.net/u/1mns13)\ **Post date:** [May 20, 2005, 5:43am UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/15 "2005-05-20T05:43:47Z")
> [@RS13](#): > > Hmmm > the cam angle sensor did nor work any better for you?? I will drop by the dyno day on saturday get it back from you. Hopefully I’ll have checked it by then, I will check the fsm to see I can check it’s output without ihstalling it. ---
**Author:** ![Buddyworm](https://avatars.discourse-cdn.com/v4/letter/b/85e7bf/32.png) [@Buddyworm](https://forums.speedlife.net/u/Buddyworm)\ **Post date:** [May 26, 2005, 10:06pm UTC](https://forums.speedlife.net/t/new-year-same-problems/139018/16 "2005-05-26T22:06:05Z")
This leak. I’m pretty sure I have the same problem. Only happens when the tank is full? Did any of those repairs work for even a little bit? And does anyone have any suggestions? The gas smell gets kinda annoying after I fill my tank. B-Wurm 😃