20v blacktop swap bogging
09-25-2015, 03:46 PM
Post: #1
20v blacktop swap bogging
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.
Find all posts by this user
09-25-2015, 04:11 PM
Post: #2
20v blacktop swap bogging
Blind shot, try to open ECU and look for leaking capacitors. VVT?
Find all posts by this user
09-25-2015, 04:13 PM
Post: #3
20v blacktop swap bogging
(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
Find all posts by this user
09-25-2015, 06:12 PM
Post: #4
20v blacktop swap bogging
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
Find all posts by this user
09-25-2015, 10:22 PM (This post was last modified: 09-25-2015 10:22 PM by ditn.)
Post: #5
20v blacktop swap bogging
map sensor connected to a white vacuum tank thingy?
Find all posts by this user
09-26-2015, 12:01 AM (This post was last modified: 09-26-2015 12:02 AM by znull.)
Post: #6
20v blacktop swap bogging
(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.

(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
Find all posts by this user
09-29-2015, 04:36 AM (This post was last modified: 09-29-2015 04:43 AM by Rascal21.)
Post: #7
20v blacktop swap bogging
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 Smile

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.

1x AE86 84` Zenki Coupè Levin 4A-GE 20v
1x AE86 83' Zenki Coupe Levin 4A-GE 16v
1x TA60 82' Sedan 2T 8V
1x TA40 78` MK1 Zenk/Pre-Facelift Wagon 4A-GE 16v
Find all posts by this user
09-29-2015, 03:57 PM
Post: #8
20v blacktop swap bogging
   
(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 Smile

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 Smile

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.
Find all posts by this user


Possibly Related Threads...
Thread Author Replies Views Last Post
  Refreshed 20v blacktop first start.. Mylesmck 6 689 10-07-2024 07:55 AM
Last Post: Ivan141
  20v Blacktop conversion.... Mylesmck 0 452 04-29-2024 05:48 PM
Last Post: Mylesmck
  Improve 20V Blacktop cooling pack 0 955 06-07-2023 01:18 PM
Last Post: pack
  Shims 20V Blacktop CHOPKIN2 3 4,710 12-23-2017 11:07 PM
Last Post: oldeskewltoy
  20v swap bell housing izanagi 2 4,154 12-15-2016 01:12 PM
Last Post: pack

Forum Jump:


User(s) browsing this thread: 2 Guest(s)

Contact Us | AEU86 | Return to Top | Return to Content | Lite (Archive) Mode | RSS Syndication