Microsquirt Tuning? B16 Engine limps after 10 miles @ 75mph
Posted: Mon Aug 20, 2012 12:24 pm
Been researching the manual and have become quite intimidated trying to figure this out. I recenty acquired an Austin Mini with a Honday B16 Motor swap running DIS and Microspquirt. Previous owner claimed everything was running perfect and no problems such with the setup in his ten years ownership.
I drive the car home the first night and each ten or so miles running about 75-80mph the car goes into what might be described as limp mode, fuel begins to bog out, until you pull car off the side of the road, and come to a complete stop (engine still running). Then you can haul bum again for another 10 or so miles. Whatever fault causes resets when you pull over and complete to a complete stop for a second.
A few points of clarification;
Running DIS, (no dizzy)
Innovative Motorsports O2 sensor wired into Microquirt box.
Car runs, starts and shuts off, driveability is completely tip top around town! Getting half decent gas mileage too.
Problem like I said only happens if you run turnpike speeds, you will be buzzing along and then suddenly engine note changes, car loses power, (like its being electronically limited and will keep doing it until you stop) (if you stay under 60 it doesn't seem to happen)
Using 93 octane always
Car was set-up in the UK, car is now in the USA (philadelphia 300 feet above sea level)
I have logged about 700 miles in all sorts of conditions around town and no problems at ALL!
I have checked plugs, gapped and clean and in excellent condition
I have added fuel system cleaner and no change
Oil has been analyzed by blackstone and no reports of fuel leakdown (thought maybe I had a leaky injector or something)
Perhaps unrelated, but worth mentioning, car is running on tiny undersized 20" tall tyres and a 4.4 final drive in trans, so 5th gear going 75mph the engine isn't exactly silent, she's screaming...how many rpm you wonder? I don't know---no tach installed yet????
I'm mechanical, but when it comes to DIY EFI tuning and engine management, I'm on unfamilar ground.
I have no clue where to start, although I am going to try to data log this with the tuner studio software or whatever I was supposed to use the manual I've been reading about using the microsquirt
I drive the car home the first night and each ten or so miles running about 75-80mph the car goes into what might be described as limp mode, fuel begins to bog out, until you pull car off the side of the road, and come to a complete stop (engine still running). Then you can haul bum again for another 10 or so miles. Whatever fault causes resets when you pull over and complete to a complete stop for a second.
A few points of clarification;
Running DIS, (no dizzy)
Innovative Motorsports O2 sensor wired into Microquirt box.
Car runs, starts and shuts off, driveability is completely tip top around town! Getting half decent gas mileage too.
Problem like I said only happens if you run turnpike speeds, you will be buzzing along and then suddenly engine note changes, car loses power, (like its being electronically limited and will keep doing it until you stop) (if you stay under 60 it doesn't seem to happen)
Using 93 octane always
Car was set-up in the UK, car is now in the USA (philadelphia 300 feet above sea level)
I have logged about 700 miles in all sorts of conditions around town and no problems at ALL!
I have checked plugs, gapped and clean and in excellent condition
I have added fuel system cleaner and no change
Oil has been analyzed by blackstone and no reports of fuel leakdown (thought maybe I had a leaky injector or something)
Perhaps unrelated, but worth mentioning, car is running on tiny undersized 20" tall tyres and a 4.4 final drive in trans, so 5th gear going 75mph the engine isn't exactly silent, she's screaming...how many rpm you wonder? I don't know---no tach installed yet????
I'm mechanical, but when it comes to DIY EFI tuning and engine management, I'm on unfamilar ground.
I have no clue where to start, although I am going to try to data log this with the tuner studio software or whatever I was supposed to use the manual I've been reading about using the microsquirt