martijn266
Member
- Joined
- Apr 21, 2020
- Location
- Zeeland, Netherlands
Hello,
Whenever im driving around my speedo sometimes works and sometimes it doesn't.
Nothing strange, had this problem a long time.
Too lazy to fix
Suddenly i started noticing something strange.
The car felt faster under WOT when the speedo was working.
First i thought it was 'tussen mijn oren' or in my imagination, but i still wanted to test it somehow.
On my way to work i drive through a 6km (4mile) tunnel so thats the ideal place to test.
When im really really steady on the throttle the (stock) turbo pressure gauge and rpm gauge give the same constant reading.
When the speedo suddenly goes from nothing to the actual speed the boost gauge moves ever so slightly up and the rpm's go up by maybe 200 rpm.
A tiny difference but my theory was correct!
I tried it a couple of times and it always happens, and when the speedo stops working the boost gauge drops down a little and the car also slows down a bit.
How does the speedo input cause this 'issue'?
Does it have to do something with the IAC?
I hope that somebody can answer my questions because i've searched the internet but it seems like no one ever noticed or posted about it.
Car is a 97 940 b230ft m90 manual with lh2.4
Whenever im driving around my speedo sometimes works and sometimes it doesn't.
Nothing strange, had this problem a long time.
Too lazy to fix
Suddenly i started noticing something strange.
The car felt faster under WOT when the speedo was working.
First i thought it was 'tussen mijn oren' or in my imagination, but i still wanted to test it somehow.
On my way to work i drive through a 6km (4mile) tunnel so thats the ideal place to test.
When im really really steady on the throttle the (stock) turbo pressure gauge and rpm gauge give the same constant reading.
When the speedo suddenly goes from nothing to the actual speed the boost gauge moves ever so slightly up and the rpm's go up by maybe 200 rpm.
A tiny difference but my theory was correct!
I tried it a couple of times and it always happens, and when the speedo stops working the boost gauge drops down a little and the car also slows down a bit.
How does the speedo input cause this 'issue'?
Does it have to do something with the IAC?
I hope that somebody can answer my questions because i've searched the internet but it seems like no one ever noticed or posted about it.
Car is a 97 940 b230ft m90 manual with lh2.4