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2001 GT fluttering

  • Thread starter Thread starter Fast6hand
  • Start date Start date Feb 17, 2020

Fast6hand

Member
Feb 4, 2020
17
5
13
Arizona
Feb 17, 2020
#1
  • Feb 17, 2020
  • #1
I have done a lot of research on this already. My issue is a bit different, so wanted to ask about it, and may be able to help others with the same problem.
Car started having a bubbly/fluttering issue. This happened after I gave it a wash, however driving home was fine, until I hit a corner and it started to misfire. I didn't wash the engine.It doesn't happen to bad when keeping smooth acceleration, however if I give it any kind of load it will start. This happens in all gears, at all rpm's.
It starts fine, idle is a little rough, revs fine with no load. Exhaust has different sound when idling, and engine will "shake" a bit more when give it any additional revs at idle. No check engine light.

Things I have checked:

- Pulled coils and plugs to check for anything unusual, nothing seemed out of place. Plugs were replaced a month ago.
- Checked ohms of coils and everything was in spec.
- Checked all connections to injectors and coils, all seemed good. Taking them off one by one changed rpms at idle

Recently I have changed a few things, like exhaust and CAI. I do have a exhaust leak, and think it is on the driver side before the upstream O2. Thinking it may need a MAF cleaning as well, since the aftermarket CAI doesn't utilize the original screen. Also, when I did the exhaust, O2 sensor was very hard to get in, due the length not being sufficient. Any thought or recommendations? Any help is appreciated.
 

Fast6hand

Member
Feb 4, 2020
17
5
13
Arizona
Feb 17, 2020
#2
  • Feb 17, 2020
  • #2
Also it doesn't clean up , and the fluttering is very uniform. Meaning it does not change sound, if that makes sense. And the IAC valve was changed a month ago. I also went to a larger throttle body and plenum, vacuum leak? Sorry this was info I forgot to mention, if it helps.
 

Fast6hand

Member
Feb 4, 2020
17
5
13
Arizona
Feb 18, 2020
#3
  • Feb 18, 2020
  • #3
Well, the problem was a little better today, that sounds funny. Anywho, I'm going to get it scanned today by my mechanic friend, so I should know more. I will report back with my findings.
 

Fast6hand

Member
Feb 4, 2020
17
5
13
Arizona
Feb 19, 2020
#4
  • Feb 19, 2020
  • #4
The car is fixed. Went to my mechanic to run codes, didn’t throw a single one, no misfire. Fuel pressure was good. Car ran like crap with no MAF plugged in. He recommended swapping boots and fresh plugs. Didn’t do the trick. So I went out and got a coil. I then swapped the coil with the others, and after switching 5 times, found the bad coil. Gonna start buying a new coil every pay period to replace the others. Man this was a pain, but happy she’s running good again.
 
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