nickb777

Hello all the UK calling

wonder if I could ask for some advice.

I have a Harrop TVS 1320 installed on my 2.2 Z22se running an lSJ TB the internals have all been upgraded Low comp pistons, balance shaft deleted and running comp blower cams. 2.8 pulley.

I am on the oem ecu which has been re-maped for this setup.

I am having trouble every so often, after hard acceleration I am loosing control of the throttle the ecu goes into limp mode, however I do not get any ecu error codes. I was wondering if anyone here has heard of such a thing happening with the Harrops.

has anyone heard of such a thing happening?

Many thanks

mrbelvedere

iTrader: (3)

its not the blower causing it

07MetallicSC

iTrader: (16)

yeah the tvs is just a paperweight really. something in the ecu and or motor

Hockeyman

iTrader: (4)

My first guess is the throttle body, whether it be wired up incorrectly or not tuned in properly.

JapEatr

iTrader: (9)

mine has done that as the maf gets to the top of the map

Speedytec

iTrader: (3)

He has no MAF on his Z22SE (European L61) ecu.

Nick, sounds like the ecu loosing control...

dtabbs

iTrader: (5)

Need to look at the predicted airflow and make sure you are not exceeding the limits set. If you exceed those limits the ECM will go in to limp mode as it believes that the throttle body has malfunctioned and is in a run away mode.

Area47

exceeding limits. check the airflow limits.

nickb777

Thanks Chaps appreciated

I have had this on and off for some years and never got to the bottom of it I thought it had something to do with my setup, however another chap here bolted on a TVS recently and has exactly the same thing. Unlike yourselves the Z22se ecu has not been fully cracked and so the tuning firm (both used the same 3rd party tuners) have been trying to tune without full access. Excuse my ignorance any idea how I check/correct if I have exceeded these limits? I don't have access to all the technical data from the mapping sessions.

I will do some searching

Staged07SS

iTrader: (25)

Post some pics of your car man.

Speedytec

iTrader: (3)

Think rwd, rear engined, plastic 2 seater bullit, weighing around 900kg. ;-)

riceburner

iTrader: (66)

pics and vids or BAN!!

dtabbs

iTrader: (5)

Pretty sure it is just one of these...

Sir_Hiro

Can I import this car into the us?

JapEatr

iTrader: (9)

Bump, Area can you elaborate on the airflow limits? Which PID are you referring to?

Area47

the hard limit of the ecm in maf hz

JapEatr

iTrader: (9)

So im exceeding 16k hertz? Or am i going to have to scale it?

Omnigear

iTrader: (4)

pretty much what the saturn sky came from =p

JapEatr

iTrader: (9)

I am still curious as to how to correct this?

Area47

you need to look at a data log file and see where the maf peaks at. if you are maxing at 16k hz. scale the calibration.