Idle hunt/dip on coast
Generally idle instability is caused by over rich condition.
If you look at the timing when the idle dips, it's stable @ 20*. Go to your main timing table & copy the 400rpm column into your idle 0 & 400rpm idle timing table columns. This will act as under speed idle timing, because it has not gone into adaptive idle as you are rolling.
FAST intake bolts are notorious for this. I used star-washers on mine to bite into the bolt head a little bit and help prevent backing out. Never had an issue with vacuum leaks. FWIW. Spring washers would probably work also
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TECH Addict
Joined: Aug 2005
Posts: 2,305
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From: Monroe,NY
How does an intake that cost $1000 dollars not have a good bolt lock washer setup to stop this from happening. The stock bolts with the rubber washers never have any problems backing out unless the washers are bad. I don't own a fast intake but it really pisses me off that something that over priced has problems like this.
How does an intake that cost $1000 dollars not have a good bolt lock washer setup to stop this from happening. The stock bolts with the rubber washers never have any problems backing out unless the washers are bad. I don't own a fast intake but it really pisses me off that something that over priced has problems like this.