IAT sensor insulation - go or no?
#1
Elite Member
Thread Starter
Join Date: Mar 2006
Location: Schwarzenberg, Germany
Posts: 1,558
Total Cats: 105
IAT sensor insulation - go or no?
Hi guys,
as I still have some problems with heatsoak on the IAT sensor, especially when the car is sitting for some minutes after a ride/and at warm weather.
(My AFRs tend to go down to 9.8 - which is the lowest the Zeitronix can display.)
When I drive it is gone after some 100meters.
On the other hand if the car runs at idle with climbing IAT temps this isn't happening.
What I thought, when I lately was at a homedepot-like store - they get this foam-insulation for housing installation pipes - If I wrap them around the pipe after my intercooler, where my IAT sensor sits, would this be clever or not?
On one hand it would keep the pipe from heat soaking so fast - on the other hand it also cools down slower (but as the cooling comes from the inside through the intercooler, it should still cool down fast.)
Am I missing something? Anyone tried this before?
Thanks for your advice!
as I still have some problems with heatsoak on the IAT sensor, especially when the car is sitting for some minutes after a ride/and at warm weather.
(My AFRs tend to go down to 9.8 - which is the lowest the Zeitronix can display.)
When I drive it is gone after some 100meters.
On the other hand if the car runs at idle with climbing IAT temps this isn't happening.
What I thought, when I lately was at a homedepot-like store - they get this foam-insulation for housing installation pipes - If I wrap them around the pipe after my intercooler, where my IAT sensor sits, would this be clever or not?
On one hand it would keep the pipe from heat soaking so fast - on the other hand it also cools down slower (but as the cooling comes from the inside through the intercooler, it should still cool down fast.)
Am I missing something? Anyone tried this before?
Thanks for your advice!
#5
Elite Member
Thread Starter
Join Date: Mar 2006
Location: Schwarzenberg, Germany
Posts: 1,558
Total Cats: 105
It looks like it isn't a problem with heat soak.
I had a chat with Ken at msextra and he told me it could be a vapor lock at the fuel pressure regulator. (The fuel in the fuel rail gets to hot and partly vapors and so the fpr see's no real map) - which could be, because my map signal line is tee'd into the fpr line and get's some strange readings, when this happens. (~95-100kpa at idle which sohould be 26-29)
Greets
I had a chat with Ken at msextra and he told me it could be a vapor lock at the fuel pressure regulator. (The fuel in the fuel rail gets to hot and partly vapors and so the fpr see's no real map) - which could be, because my map signal line is tee'd into the fpr line and get's some strange readings, when this happens. (~95-100kpa at idle which sohould be 26-29)
Greets
#6
Senior Member
iTrader: (7)
Join Date: Aug 2007
Location: Southern Indiana
Posts: 1,369
Total Cats: -1
It looks like it isn't a problem with heat soak.
I had a chat with Ken at msextra and he told me it could be a vapor lock at the fuel pressure regulator. (The fuel in the fuel rail gets to hot and partly vapors and so the fpr see's no real map) - which could be, because my map signal line is tee'd into the fpr line and get's some strange readings, when this happens. (~95-100kpa at idle which sohould be 26-29)
Greets
I had a chat with Ken at msextra and he told me it could be a vapor lock at the fuel pressure regulator. (The fuel in the fuel rail gets to hot and partly vapors and so the fpr see's no real map) - which could be, because my map signal line is tee'd into the fpr line and get's some strange readings, when this happens. (~95-100kpa at idle which sohould be 26-29)
Greets
#7
Elite Member
Thread Starter
Join Date: Mar 2006
Location: Schwarzenberg, Germany
Posts: 1,558
Total Cats: 105
Solution found!
Hi,
I just wanted to let everybody now that I have found the solution to my hot start MAP/AFR problem.
It turns out that the European NB (99-00 maybe/surely the later also) have a valve inline the fuel pressure regulator line, which on hotstarts keeps the FPR from seeing vacuum for 150 sec - and so it kept my MAP line at the MS also from seeing vacuum and the MS dumped in a lot of fuel even at idle.
So beware European MX-5 drivers - do not use the line to the FPR for your MAP source! (Or at least use the line before the valve)
Now I just have to retune my MAT correction table.
Greets
Sven
I just wanted to let everybody now that I have found the solution to my hot start MAP/AFR problem.
It turns out that the European NB (99-00 maybe/surely the later also) have a valve inline the fuel pressure regulator line, which on hotstarts keeps the FPR from seeing vacuum for 150 sec - and so it kept my MAP line at the MS also from seeing vacuum and the MS dumped in a lot of fuel even at idle.
So beware European MX-5 drivers - do not use the line to the FPR for your MAP source! (Or at least use the line before the valve)
Now I just have to retune my MAT correction table.
Greets
Sven
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