My Problem... yes that's right... again

[gthompson97]

What directions did you use to install the SAFC? The ones from 2gnt.com? I have a feeling there's a problem somewhere either with your SAFC wiring, or the TPS harness, it's just too weird of a problem for it to be anything mechanical.

[david-b]

TPS harness is perfect. Used directions from all over. Kinda took them all, read them numerous times, and then installed it then. It used to read 100%. Then afterward when I got the new TB, it didn't. It would say like 50% at WOT. Playing around with it an "fine tuning" got it to bring it up to 75%, and now it's at 82%. I haven't seen anything in the AFC to adjust that. Do you think I should do a reset on the AFC?

[gthompson97]

Yeah, I would write down the settings and do a master reset. But if it used to read 100% before the TB install, then it must have something to do with that bored one you bought.

[david-b]

But that doesn't make sense. Nothing changed. The butterfly still opens the same. The tension is set correct to where the plate opens all the way at WOT. TPS is new. And now that I'm thinking about it, the new one at a tme did read 100%. However, when that read 100%, the datalogger was really low then. I haven't hooked the logger up to here in a while, so I'm not sure what the reading is. I'm going to try the reset tomorrow and see what happens.

I took a pretty good size trip to a friends cousins house for a graduation party. The car ran great. There was a little idle surge, but nothing major. Once the car warmed up fully, each time I shifted out of gear, the rpms dropped perfect. Even when shifting between gears, I noticed the rpms were dropping very quickly compared to just hanging there. Good and bad, but you know.

Even did an expressway run against a white "GST". That's in quotes because it obviously wasn't. Had a mufler and I think that was all. He couldn't catch up to me at all while doing 80-110. Close, but couldn't pass. Maybe it was slower because his drivers side rear window was made of tape.

So again, I'm goign to reset the SAFC tm and see what happens there about the readings. Besides that, so far so good. We'll see though

[gthompson97]

Dude, your car is fucking weird. Some days it's fine and some days it's not. Problems like that sometimes NEVER go away. Maybe it's got to do with the engine temp? I have no idea anymore.

[defiancy]

Maybe you should try swapping in a different ECU.

I mean you have tried everything else. Might as well throw in the kitchen sink as well.

[david-b]

Originally Posted by gthompson97

Dude, your car is fucking weird. Some days it's fine and some days it's not. Problems like that sometimes NEVER go away. Maybe it's got to do with the engine temp? I have no idea anymore.

Well engine temp is fine. If you recall, I had that thermostat problem earlier but is fine now. It does happen when the engine is cold, but that's understandable. Damn, it's going to be about 0 degrees this week now.

Today my radar detector came up High Voltage a couple times. Voltage gauge was reading high. Any relations with that and possible the ECU?

I'm trying to get all this shit straightened out now before I do the head swap so I know everything is fine for when I do it. I know that if something doesn't work, it's because of something I did/changed then.

[gthompson97]

I don't think the voltage gauge, ECU, and radar detector really have anything to do with one another, so my guess is no.

And my last post, yeah I was drunk so I just kinda rambled. But what I meant was that maybe the temperature of the engine has something to do with the problem. Does it seem to get better as the engine temp heats up, or is it just at random times?

[Mikelb]

did you adjust the TPS sensor, for the WOT?

[david-b]

Originally Posted by Mikelb

did you adjust the TPS sensor, for the WOT?

On 420a's its not adjustable. It's just a straight bolt-in. Not adjustable like the 4g63.

I was just saying about the voltage because it's a new problem coming up. It did it again today for a little bit also.

It does happen more frequently when cold, yes. BUT, it also happens a lot when fully warmed. I'm honestly thinkin EGR valve. It seems to me that its sticking open, filling the IM with exhaust when it shouldn't be. When I pulled the TB on Saturday, the back of the butterfly plate was filthly. I've never seen it that black... and we know what makes the IM dirty on the inside

[Mikelb]

Originally Posted by david-b

On 420a's its not adjustable. It's just a straight bolt-in. Not adjustable like the 4g63.

I was just saying about the voltage because it's a new problem coming up. It did it again today for a little bit also.

It does happen more frequently when cold, yes. BUT, it also happens a lot when fully warmed. I'm honestly thinkin EGR valve. It seems to me that its sticking open, filling the IM with exhaust when it shouldn't be. When I pulled the TB on Saturday, the back of the butterfly plate was filthly. I've never seen it that black... and we know what makes the IM dirty on the inside

Ah, sry... it's only been a few months since I haven't had my 420, but still a long time compared to the time I had it (and worked on it)...
Sry, I don't know what else to tell ya then...

[Wick3D-PimP]

Hey man i've got he same problem is you except that i fixed the idling problem by changing the engine coolant sensor. Aparently when that sensor is bad... the car dumps way to much gas into the engine causeing it to surge funny like that.
However i still have the same misfire problem u have.. at low rpms if i give it to much pepper it stumbles like its misfireing a piston.. then after about 5000pms itll randomly buck..
And now scince its been cold it is randomly idling between 500-1000 rpms, it starts at 800 then sounds like it gunna die.. then picks up to 1000 rpms then comes down again and repeats.

[gthompson97]

Originally Posted by Wick3D-PimP

And now scince its been cold it is randomly idling between 500-1000 rpms, it starts at 800 then sounds like it gunna die.. then picks up to 1000 rpms then comes down again and repeats.

Have you checked the IAC yet? I'm betting that's the problem.

[Wick3D-PimP]

Just an update.. the low rpm idling problem was fixed by removing air bubbles from my cooling system

And the problem with the misfireing.. im 95% sure i jumped a tooth on the intake cam. Anyone know of any ghetto methods of fixing the timing without taking that entire side of the engine out? I was thinking about just breaking the timing belt caseing then attempting to get a little slack then adjust the cam...?

Also is there anything bad that can come of not having the case on the timing belt?

[gthompson97]

No, there's no "ghetto way" of fixing the timing belt, you'll just end up with a bunch of "ghetto broken parts." You have to do a complete job to get your car fixed right if you did in fact jump a tooth.