Hey all,
My 2018 Fiat Doblo with the 1.6l Multijet diesel engine, has strange IAT behaviour, and I was wondering if a larger intercooler would help.
I've noticed, using an OBD tool, that at 80-95kmph, the intake air temp sits at around 45 degrees C, regardless of ambient temp.
At 95-105kmph, the IAT rises to 60+ degrees C. Regardless of ambient temp.
Then, at 110kmph, the IAT drops again to 40-45 degrees C. Regardless of ambient temp.
This is despite being in the same gear, so the revs aren't dropping.
Is it strange that the intake temps are hotter at 100 than what they are at 110? Would it be tuned like this for any particular reason?
I only ask because I do a lot of freeway driving and our limit is 100, so my car is spending a lot of time sucking in hot air. Is this detrimental to engine health, or do diesels not mind? Do hotter intake temps help the DPF do burn offs? Would fitting a larger IC do more harm than good?
Thanks for any advice.
EDIT: Just to be clear, I'm not looking for performance gains. Just want the van to last as long as possible.
My 2018 Fiat Doblo with the 1.6l Multijet diesel engine, has strange IAT behaviour, and I was wondering if a larger intercooler would help.
I've noticed, using an OBD tool, that at 80-95kmph, the intake air temp sits at around 45 degrees C, regardless of ambient temp.
At 95-105kmph, the IAT rises to 60+ degrees C. Regardless of ambient temp.
Then, at 110kmph, the IAT drops again to 40-45 degrees C. Regardless of ambient temp.
This is despite being in the same gear, so the revs aren't dropping.
Is it strange that the intake temps are hotter at 100 than what they are at 110? Would it be tuned like this for any particular reason?
I only ask because I do a lot of freeway driving and our limit is 100, so my car is spending a lot of time sucking in hot air. Is this detrimental to engine health, or do diesels not mind? Do hotter intake temps help the DPF do burn offs? Would fitting a larger IC do more harm than good?
Thanks for any advice.
EDIT: Just to be clear, I'm not looking for performance gains. Just want the van to last as long as possible.
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