3/4 throttle faster than wot?

[Dred]

It's really weird, my car feels awesome on a regular drive (i drive it daily). Whenever I have WOT it feels like it's really lacking the power, it's not bucking, not knocking, and not doing anything out of the ordinary, it just literally accelerating slower than if I have it at like 80% tps and feels like a non-turbo car. Could this be a bad ECU or is there another problem? Only thing that's different between a 80% tps pull and a WOT pull is that at 80% boost is at 10psi even, and at WOT it creeps around 12. I have no regulator and the actuator is connected directly to the outlet pipe from the turbo. I boost leaked at 15psi and it's fine w/o leaks. Anyone have any ideas? Input appreciated.

 

[GVR4592]

Do you have a datalogger?

 

[oztofrdm]

it might be pullling timing at WOT or...You could be getting more than 18deg. of timing when at 80% throttle. That or it could be since the boost is so low and is playing with your mind.

Get a logger and find out for real

 

[Dred]

I have a logger i'm gonna make some logs at 80% vs 100% tps soon. Logs are coming

 

[Dred]

Sorry for taking a long time, but I had an annoying oil leak I had to take care of before I could start working on performance, I have taken care of it I'm very happy about that.

Anyways, this is my 3rd o2 sensor btw, and it just flatlines pretty much at WOT, it's only 1 month old, and already it does that, however at part throttle it does what it's supposed to do, pretty weird. Car runs very well sometimes at WOT, but still, faster at about 3/4 to 1/2 wot. I am getting high knock and I'm wondering what's causing it. My timing is still good tho, 18* which I think is decent with the amount of knock I'm getting at 10lbs of boost.

Timing FTL FTM FTH 02S BATT TPS RPM KNOCK INJ
21° 139.6% 103.7% 120.1% 0.02V 13.9V 92.2% 4156 0 14.59ms
21° 139.6% 103.7% 120.1% 0.04V 13.9V 98.4% 4250 0 15.10ms
20° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 4406 1 15.10ms
21° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 4500 0 15.62ms
20° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 4625 1 15.87ms
20° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 4594 0 16.13ms
20° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 4750 0 16.13ms
21° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 4938 5 15.87ms
19° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 4906 5 16.13ms
19° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 5063 4 16.38ms
18° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 5125 8 16.38ms
18° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 5313 7 16.64ms
19° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 5344 7 16.90ms
18° 139.6% 103.7% 120.1% 0.04V 13.9V 100.0% 5375 6 17.66ms
20° 139.6% 103.7% 120.1% 0.08V 13.8V 100.0% 5531 7 17.66ms
19° 139.6% 103.7% 120.1% 0.12V 13.9V 100.0% 5625 14 17.92ms
17° 139.6% 103.7% 120.1% 0.02V 13.9V 100.0% 5594 13 17.66ms
18° 139.6% 103.7% 120.1% 0.18V 13.8V 100.0% 5844 20 17.66ms
17° 139.6% 103.7% 120.1% 0.02V 13.8V 99.6% 5875 19 17.92ms
17° 139.6% 103.7% 120.1% 0.00V 13.8V 97.3% 5906 19 17.66ms
18° 139.6% 103.7% 120.1% 0.00V 13.8V 96.9% 5875 19 17.92ms
18° 139.6% 103.7% 120.1% 0.00V 13.8V 90.6% 6000 19 17.66ms
18° 139.6% 103.7% 120.1% 0.00V 13.8V 90.6% 6156 18 17.92ms
17° 139.6% 103.7% 120.1% 0.00V 13.8V 84.7% 6219 18 17.92ms

The reason I have the BATT logged is I was tryin to see if my bat voltage dropped at high rpms, it doesn't My IPW is pretty high for only 10lbs, I wonder if there's any other problem that can cause this other than a big boost leak, i've tested for 10lbs and I only have a tiny leak around the TB which I will fix soon (only about 1psi/secs found w/ soapy water).

Something I guess I should state is that I don't have a rewired fuel pump, and the car sat for about a year before I was finished w/ my rebuild, so maybe the gas inside the tank has gone bad, alhtough I've refilled about 30 times already w/ 94 octane since I fired the car up about 4 months ago for the first time. Also I have the lower honey comb removed from my MAS and the screw adjusted, maybe that can cause the problem as well, but w/ 17ms IPW think that it's still overkill for 10lbs, no? That and my trims are all maxed out, all possible ideas can help, and obviously this is a fuel delivery problem imo. The weirdest thing I find is that the trims are maxed out which suggest that I am runnig lean, but I get high IPW and the IDC are in the high 90%s.

Just trying to make a list of things I should do next weekend to help solve the problem, so far I have to get:
-new fpr and fuel filter
-rewire the fuel pump
-clean out fuel tank


Help and ideas are greatly appreciated.

 

[Quasimondo]

After you replaced your oxygen sensor, did you reset the ecu to get that low trim back to 100%? The previous dead sensor probably caused the low trim to max out, since the ecu wasn't seeing anything from the O2, it interpreted the low voltage as running lean and it kept raising the fuel trim to richen it up. If the fuel trim creeps back up after you've reset the ecu, then you might be looking at a boost leak.

A rewire shouldn't be necessary if you're only boosting 10 psi.

 

[Dred]

Yeah, I've reset the ECU a few times now actually, cause I've been doing alot of work on the engine trying to find the oil leak that I had (which btw happened to be from the plug in the oil pump cover coming loose, the one that works as a window for the oil-pump balance shaft bolt if anyone might be interested). I guess another question I have is, would the engine knock if I had too much fuel? i.e. running rich? I still dont get it tho, ecu shows running lean if you look at the trims but the ipw indicates that it should be the opposite, me running rich. Another thing, does anyone else have their o2 sensor read as low as mine at wot?

 

[hiimt0ny]

what kind of spark plugs are you using? get some ngks if you dont have them in. i was running bosch when i first got my eclipse and it ran better at about 75% tps than at wot. change to ngks if you dont have them and if you do have them maybe go to the 7's

 

[Dred]

I'm running NGK bpr6ey's if my memory serves me right, maybe I should try the ES's ? I looked up the spark plugs and the were suposed to be EY's from the book, so I just ordered them. Another thing, anyone have any preference about v-power vs platinum vs iridiums? I know iridiums aren't the greatest and really meant just to last longer than anything else.

 

[hiimt0ny]

just get some normal ngks from slowboyracing and Gap them correctly, also try cleaning out your intercooler with some gas....
also your getting really bad knock maybe lowering your timing a bit could help....

 

[Dred]

Just pulled the plugs (they have about 8k on them) and the ground electrodes are beige in color, not white, but a bit darker. So I'm not exactly running rich, although I do have the lower honey comb removed on my mas, and I always idle before I shut the car off, maybe that's why they dont seem to be flooded cause the car runs on the leaner side. And they don't smell like gas at all, they smell more like assembly lube for some reason heh. Anyways, the plugs also have brown stuff that look like burns around the ceramic part right where it meets the hex nut.

What do you guys think? Am I running too hot for these plugs maybe? A bit lean perhaps? Btw they are BPR6ES's but the v-power, not the platinums. They also don't seem to be gapped very consistently, so tomoow at the shop I'm going to gap some fresh spark plugs myself, ###### gonna go for the platinums tho.

 

[danyz250f]

dont use platnium plugs they burn super hot and are no good for boost. Get the regular ngk bpr6 or 7 es plugs. They are cheaper too. Alot cheaper. Gapped at .028

 

[Dred]

Yeah that's what I was thinking, I'm thining of getting the iridiums tho. Mainly because since iridium is a much stronger material the tip is actually very tiny and reduces spark jump. That and they last lnger, i'm thikning of 7's tho, since these 6's burned out pretty quickly. Also, spark plugs do not cause heat, they transfer heat, not TO the combustion chamber, but FROM it.

 

[Dred]

Well, that definately fixed the problem. Got myself bpr7es's , gapped to .28, and retarted the timing to about 2* btdc and the car runs amazing. It's never ran stronger, I'm so happy right now I could scream. Still a bit of knock past 6k but hopefully a rewire will fix that this weekend.