View Poll Results: GTS Owners: Does/Did you GTS ping, pink, knock, pre-detonate?
Yes. My GTS pings - I don't know why.
11
18.33%
Yes. My GTS did ping but it was cured - fuel problem (pump, injectors, etc.)
5
8.33%
Yes. My GTS did ping but it was cured - knock sensor and/or EZK problem.
0
0%
Yes. My GTS did ping but it was cured - other problem.
4
6.67%
Maybe. I'm not really sure.
5
8.33%
No. My GTS does not ping as far as I know.
11
18.33%
No. I'm sure that my GTS does not ping.
24
40.00%
Voters: 60. You may not vote on this poll
GTS Owners: Does/Did your GTS ping, pink, knock, pre-detonate?
07-07-2006, 09:08 PM
#62
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Originally Posted by John Speake
2 deg isn't going to affect the power much Randy. I doubt you would be able to detect it when driving.
Au contraire, mon frere - I am one with my car. That's like sayin' I wouldn't detect 2 degrees of erectile dysfunction while *******' - I'd notice!
06-15-2007, 02:33 AM
#66
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Charley - my issues were solved by a combination of reconditoned MAF and reflowed injectors - both make sense... can have other benefits - but prob a $1000 combo.
Alan
Alan
06-15-2007, 02:37 AM
#67
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Thanks Alan. I'm not familiar with the term 'reflowed injectors'. Would they retain the same poundage? Once warm, I get pre-ignition in all gears under load.
06-15-2007, 05:31 AM
#69
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Originally Posted by Keith
Charley, did you ever change the plugs to copper single electrode?
06-15-2007, 06:21 AM
#70
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GTS do seem "on the edge" as far as detonation is concerned. Any oil vapour in the intake or cylinder will just make matters worse.
An aged MAF will tend to give tip in detonation becasue it will not provide the instantaneous mixture enrichment necessary to prevent detonation.
I know Greg Brown has been SharkTuning the EZK on a GTS which has a very severe detonation issue.
The GT EZK EPROM will help in less severe cases.
An aged MAF will tend to give tip in detonation becasue it will not provide the instantaneous mixture enrichment necessary to prevent detonation.
I know Greg Brown has been SharkTuning the EZK on a GTS which has a very severe detonation issue.
The GT EZK EPROM will help in less severe cases.
06-15-2007, 11:18 AM
#71
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I'm about ready to jump back on this horse. Or, at least continue trying to solve my GTS' pinging problem.
I have one of John's MAS, newly rebuilt, that I'm going to put in the car.
I have yet to check the plugs.
One other thing to consider. perhaps:
Carbon buildup.
I have one of John's MAS, newly rebuilt, that I'm going to put in the car.
I have yet to check the plugs.
One other thing to consider. perhaps:
Carbon buildup.
06-15-2007, 12:05 PM
#72
Hi fellas,
Got in on this thread late, but have some input to share.......
When I first got my 93 it had some pinging, and I went crazy trying to fix it, and though it's mostly gone now, I can still induce some pinging......
One thing I found was that the in-tank pump was bad, and it cured the problem 90%, but even after new knock sensors, hall sender, rebuilt injectors, re-timed cams, new oxygen sensor, plugs, wires, caps, rotors...... Motorvac service, adjustable fuel pressure regulator turned up, etc, etc, and it still is not completely gone. (I have not swapped MAF's but that could be one more thing to try....)
It runs cool, I run Mobil 1 15w 50, Bosch Platinum 4's, and I religiously use 93 octane, but it's an issue I have not been able to conquer completely..... I've never heard the first ping from either the S4 or GT.....
I've seen down past the valves in all three engines, and the GTS has a tad more carbon build-up....
Of course, since GTS's burn more oil, they're definitely more prone to carbon build up and detonation issues...... I run Techron regularly and try to keep it blown out.... It doesn't have any faults stored.....
Would love to put this to bed too....
Best,
Got in on this thread late, but have some input to share.......
When I first got my 93 it had some pinging, and I went crazy trying to fix it, and though it's mostly gone now, I can still induce some pinging......
One thing I found was that the in-tank pump was bad, and it cured the problem 90%, but even after new knock sensors, hall sender, rebuilt injectors, re-timed cams, new oxygen sensor, plugs, wires, caps, rotors...... Motorvac service, adjustable fuel pressure regulator turned up, etc, etc, and it still is not completely gone. (I have not swapped MAF's but that could be one more thing to try....)
It runs cool, I run Mobil 1 15w 50, Bosch Platinum 4's, and I religiously use 93 octane, but it's an issue I have not been able to conquer completely..... I've never heard the first ping from either the S4 or GT.....
I've seen down past the valves in all three engines, and the GTS has a tad more carbon build-up....
Of course, since GTS's burn more oil, they're definitely more prone to carbon build up and detonation issues...... I run Techron regularly and try to keep it blown out.... It doesn't have any faults stored.....
Would love to put this to bed too....
Best,
06-15-2007, 12:21 PM
#73
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I count myself as lucky. The only ping I have ever heard with 93 GTS (94 engine) was with off-brand gasoline.
06-15-2007, 12:46 PM
#74
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Mine still pings or so my wife tells me as I can't hear it.
I have new pumps to install - already has new MAF.
I will let you know once the new pumps are in.
Roger
I have new pumps to install - already has new MAF.
I will let you know once the new pumps are in.
Roger
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
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Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
06-15-2007, 03:33 PM
#75
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Yes, just use the Bosch copper. It is the cheapest thing to change of all the recommendations. You may even find some better performance from them!