Hesitation and pinging issue
06-17-2016, 12:17 PM
#1
4th Gear Member
Thread Starter
Join Date: Jun 2009
Location: Arizona
Posts: 1,147
Hesitation and pinging issue
I have had the car a little under 2 months and have about 1100 miles on the clock. I had noticed a slight hesitation under acceleration when the car is cold, but figured it would go away after a break in period. Hesitation still present. Does go away after car has warmed up a bit, but returns if car sits for any length of time. I have also noticed the car tends to ping under heavy acceleration at each shift point. I have used the same gas station since day one and they are rated at top tier and have had no issues with my other vehicles using this gas. Was hoping someone could shed some light on this for me.
06-17-2016, 02:32 PM
#2
Gentleman's Relish
Join Date: Feb 2005
Location: AZ
Posts: 13,090
I have had the car a little under 2 months and have about 1100 miles on the clock. I had noticed a slight hesitation under acceleration when the car is cold, but figured it would go away after a break in period. Hesitation still present. Does go away after car has warmed up a bit, but returns if car sits for any length of time. I have also noticed the car tends to ping under heavy acceleration at each shift point. I have used the same gas station since day one and they are rated at top tier and have had no issues with my other vehicles using this gas. Was hoping someone could shed some light on this for me.
Anything done to the new car like a tune? Sounds like the timing is too far advanced or you have heat soak.
What do you consider 'top tier' and what octane you using?
06-17-2016, 02:55 PM
#3
4th Gear Member
Thread Starter
Join Date: Jun 2009
Location: Arizona
Posts: 1,147
Sorry forgot to mention there is no tune, bone stock. Top tier here in Az is just just a cleaner fuel used at higher end gas stations. Shell, stuff like that. Have been running 87 octane since day one.
06-17-2016, 03:04 PM
#4
Gentleman's Relish
Join Date: Feb 2005
Location: AZ
Posts: 13,090
That's probably part of your problem there. 87 Octane. While it will run on 87, it probably states premium fuel recommended/suggested (91 octane) in the manual.
At 87 in this heat it's probably tapping out on how much timing the PCM can pull to avoid pinging, that's why you are getting it at WOT.
Run your tank near empty then run a couple of tanks of 89 octane to see if your problem goes away. Don't use octane booster, it's like trying to use a pixie stick to get energy, pure junk.
At 87 in this heat it's probably tapping out on how much timing the PCM can pull to avoid pinging, that's why you are getting it at WOT.
Run your tank near empty then run a couple of tanks of 89 octane to see if your problem goes away. Don't use octane booster, it's like trying to use a pixie stick to get energy, pure junk.
06-17-2016, 07:48 PM
#5
4th Gear Member
Thread Starter
Join Date: Jun 2009
Location: Arizona
Posts: 1,147
That's probably part of your problem there. 87 Octane. While it will run on 87, it probably states premium fuel recommended/suggested (91 octane) in the manual.
At 87 in this heat it's probably tapping out on how much timing the PCM can pull to avoid pinging, that's why you are getting it at WOT.
Run your tank near empty then run a couple of tanks of 89 octane to see if your problem goes away. Don't use octane booster, it's like trying to use a pixie stick to get energy, pure junk.
At 87 in this heat it's probably tapping out on how much timing the PCM can pull to avoid pinging, that's why you are getting it at WOT.
Run your tank near empty then run a couple of tanks of 89 octane to see if your problem goes away. Don't use octane booster, it's like trying to use a pixie stick to get energy, pure junk.
06-21-2016, 11:35 PM
#6
1st Gear Member
Join Date: Jun 2016
Location: Texas
Posts: 129
Thread
Thread Starter
Forum
Replies
Last Post
Dan Moldovan
4.0L V6 Technical Discussions
3
04-06-2016 09:40 AM