some help with bog

japakos

Member +
Well here we go. The only problem I have which drives me nuts is that I can't take off , launch or whatever is called. Running a 4efte with tongs @ 1 bar, emanage blue, autobahn manifold, large fmic, 2" straight through exhaust etc etc. Everything is brand new like plugs, rotor arm /cap, ultra 7mm leads etc. No boost /vacuum leaks (checked with the right equipment).
When I am about to take off, if I floor the gas pedal and I let off the clutch it bogs down and won't move.. It needs time to overcome it's problem . I don't know how to say it. Trying to take off from a slight uphill and I have to slip the clutch , give it more revs to go. Let's say I have floor the gas and release the clutch, it will do nothing at all , fall on it's face and slowly pick up till it hits boost. Low end torque is shit , ok it's a 4efte but anything below boost it's crap. But the thing that really pisses me off is that I just can't take off nicely. Whatever I do I have to slip the clutch or give it more revs to go. The only thing that I haven't changed in the engine is the fuel pressure regulator which is stock. Do you think that this might be dead or something and gives me crap? Emanage below boost is at 0 everywhere so it drives with the oem 4efte ecu map down there. I even disconnected the damn thing and drive it stock and does the same thing. Floor it down low, no go, it's like it bogs down or something and needs time to overcome it. Slow response or something , I don't know. Oh, my af readings are 14.7 when it does that, although I experience a rich condition everytime I reset the ecu for a week or something. But even if this thing cures and I get steady 14.7 reading while on idle it does the exact same thing. It's like it labors to take off. Other than that the car drives fine , no problem at all. It's like I have 2hp when I try to take off and then picks up good.
 
Last edited:

H_D

Member +
can u get it wheelspin? If not then i would say its an issue with your clutch. 14.7 on af is fine off boost/idle.
 

elison

Member +
I have heard about this and that poeple where talking about a uncalibrated TPS. Maybe some other EP gurus can confirm.
 

dac69er

Super Moderator
base ignition timing ok? engine timing correct? timing between the 2 camshafts ok? who mapped the car?

as above, I would check the tps is set correctly to start off with then work from there.
 

japakos

Member +
TPS is set correctly with a multimeter. Base timing is 10 degrees with the timing gun. I mapped the car myself but that's not the issue as even if I disconnect the emanage and stay stock it does the same thing. Yeah, I get a lot of wheelspin once it boosts no problem. Oh, clutch/press. plate are new with 1000 miles on them.
It doesn't make any sense.. it's something mechanical that I'm missing here. Everything is set correctly, camshafts inside etc etc. If I advance the timing with the emanage before boost for ex. 10-15 degrees , still, it does the same thing. Ok a bit better but it hangs me right there if you know what I mean. It won't go, it copes too much. It like, floor it, bog, steady, pick up , and go off. This is only while on traffic light / stopped and want to leave fast. It ain't gonna happen. It bogs and takes off after that bog. You floor the gas once you release the clutch and the thing does nothing for a sec or too. It's like a one stroke kart engine , don't know how to say it.
 
Last edited:

Sheldon

Malta Area Rep.
may sound stupid but seen this prob. inlet manifold gasket? have you removed it at some point maybe? seen one leaking and when it launches/certain rpm it bogs down and then it goes normal
 

dac69er

Super Moderator
What's the compression like? Could be a worn engine. And when you say low rpm, how low are we talking?
Has it always been like that?
 

japakos

Member +
Both two engines I had (one blew) are doing the same thing. No compression is good at all 4 cyl. Can't recall the number but it was better than expected. When I say low rpm I mean right at the very take off. Lets say 1500 rpm, release the clutch and floor it. It does nothing and it needs it's time to rev up and go. I will try to make a video for you to see. Inlet manifold gasket hu? Hm... Might check that too. Anything to do with rich condition I am having after ecu reset? It takes a week to fix itself and I might have to do it manually sometimes with the emanage , playing with - and + in the map's map. And when turn it back to 0 I have a 14.7 steady. But still, hard to take off. Floor it after releasing the clutch, nothing... And slowly picks up
 
Last edited:

Guye

Lifer
I tuned my emanage setup with detcans and I added timing in the lower rpm off boost range to improve low end response. It also helped with spool up as well. Your response should have improved when you did the same.
 
Top