20v blacktop swap bogging

[znull]

Hi guys, I have a ae86 hatch and recently did a 20v blacktop swap. All good with the swap, I have a distributor relocation kit (SAM). The engine is running perfect at idle, runs incredible on WOT, but if I slowly rev it, when it get's past 3500rpm it starts to hesitate and sometimes misfires. Even if I try to keep it constantly at 4000rpm for example it boggs... I checked all the sensors, sta wire, timing, everything is at it's place... new O2 sensor, coil, spark plugs, rotor... No CEL codes what so ever. I can't seem to sort this one out. I've been killing the internet theese last few days but nothing works. Maybe someone has an ideea and is willing to help me. Cheers guys.

[isac]

Blind shot, try to open ECU and look for leaking capacitors. VVT?

[znull]

(09-25-2015 04:11 PM)isac Wrote:  Blind shot, try to open ECU and look for leaking capacitors. VVT?

Hi,

I can feel the VVTI, still i'll look inside the ECU.

Regards

[pack]

I've read alot about bogging.... You had a 4AGE before? A true AE86? Or maybe it was an SR version?

I've read about the fuel pump issue causing bogging.....

Also... did you connect correctly the SamQ kit?

Regards

[ditn]

map sensor connected to a white vacuum tank thingy?

[znull]

(09-25-2015 06:12 PM)pack Wrote:  I've read alot about bogging.... You had a 4AGE before? A true AE86? Or maybe it was an SR version?

I've read about the fuel pump issue causing bogging.....

Also... did you connect correctly the SamQ kit?

Regards

4ac SR but with ae86 vin, SAMQ i think is installed correctly (few screws ) fuel pump is Jegs and i measured the pump and is in the correct values from 20vblacktop manual, also changed the fuel lines to 7 mm from manual.

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(09-25-2015 10:22 PM)ditn Wrote:  map sensor connected to a white vacuum tank thingy?

yes, checked,verified the values and they are identical with manual

[Rascal21]

Sort of what I have experienced as well.
How long has it been since you`ve fiddled with ignition timing? If recent enough (within the last 500km) the ECU may need to learn a little bit yet. Don`t be afraid to drive the car, if your base timing has been set with engine idling in CEL mode, just drive around in normal mode (dont WOT it all the time) for around 2-4 weeks.

One thing is revving in idle, if you don`t drive the car under various loads there is no way the ECU is going to learn to compensate

I`m not too sure about MAP sensor, mine is connected to the vacuum rail on the intake.

Adjustable FPR is not a bad idea, you can fiddle with fuel pressure (2.3-2.6 bar) until you find the perfect sweet spot there as well.

[znull]

   

(09-29-2015 04:36 AM)Rascal21 Wrote:  Sort of what I have experienced as well.
How long has it been since you`ve fiddled with ignition timing? If recent enough (within the last 500km) the ECU may need to learn a little bit yet. Don`t be afraid to drive the car, if your base timing has been set with engine idling in CEL mode, just drive around in normal mode (dont WOT it all the time) for around 2-4 weeks.

One thing is revving in idle, if you don`t drive the car under various loads there is no way the ECU is going to learn to compensate

I`m not too sure about MAP sensor, mine is connected to the vacuum rail on the intake.

Adjustable FPR is not a bad idea, you can fiddle with fuel pressure (2.3-2.6 bar) until you find the perfect sweet spot there as well.

(09-29-2015 04:36 AM)Rascal21 Wrote:  Sort of what I have experienced as well.
How long has it been since you`ve fiddled with ignition timing? If recent enough (within the last 500km) the ECU may need to learn a little bit yet. Don`t be afraid to drive the car, if your base timing has been set with engine idling in CEL mode, just drive around in normal mode (dont WOT it all the time) for around 2-4 weeks.

One thing is revving in idle, if you don`t drive the car under various loads there is no way the ECU is going to learn to compensate

I`m not too sure about MAP sensor, mine is connected to the vacuum rail on the intake.

Adjustable FPR is not a bad idea, you can fiddle with fuel pressure (2.3-2.6 bar) until you find the perfect sweet spot there as well.

today, i've clean the throttle bodies, changed all vacuums line.

Make sure you have a SPD input to the ECU.-Check. (The car misfires even if standing still. I press the gas 1/4 it starts revving, and when it reaches 3500 it instantly starts ti hesitate, sometimes misfire. On WOT it goes pretty well, sometimes it does the same there aswell.. but just sometimes

I have new o2 sensor installed. = Hilux 2.4 N/A OEM toyota

Checked sensor and wire to ecu also. Just installed new rotor, cap is mint, tried new coil.

The only thing I can say is wrong is the valve lash at 1 maybe 2 valves.. I can hear them ticking but it would be impossible to be the reason for my problem.