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Low speed surging - updated
by
stewardc
on 11 Aug, 2009 04:00
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I have a completely rebuilt AAZ with a Giles pump. Often, at slow speeds I get surging or Jerking which I can only fix be stepping down hard on the throttle. My old 1.6 TD, and an old AAZ in a Jetta, never had this issue, and it has me baffled. I've even replaced all the motor mounts in hopes of eliminating it, but to no avail. A friend also has a modded AAZ in a Rocco with the same issues. He says it is a result of all the modifications, and is a small price to pay for all the power. I agree, but it sure is annoying. I have contacted Giles, so I will keep you all updated on any suggestions.
Does anyone have any ideas or cures for this problem?
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#1
by
burn_your_money
on 11 Aug, 2009 10:03
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Have you talked to Giles about it?
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#2
by
stewardc
on 11 Aug, 2009 10:43
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Not yet. I haven't been able to get him.
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#3
by
jtanguay
on 11 Aug, 2009 18:55
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i think it has to do with the governor and how its modded. after getting the pump changed on my 1.6TD i noticed the same "surging" (more like the car was more jerky?) which wasn't there before with the old (leaky) pump. and the re-sealed pump had the governor mod... but it did have more power, and the power kept going right till the redline, which was cool but scary at times
i can't remember if adding the small lift pump helped though...
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#4
by
Jettage1
on 11 Aug, 2009 19:47
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I am VERY interested to hear any answers to this question. My car has done exactly the same thing since I installed my Giles pump this year. Never did it at all with the stock pump. I don't particularly like it, but it's #3 on my list of driveability issues to resolve, so haven't pestered Giles about it yet. (#1 is cold start issues, #2 is smoke-tuning, in case you were wondering
)
If anyone has any solutions to the surging, I'm all ears!! (and it's not related to loose IP mounting bolts, either)
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#5
by
stewardc
on 12 Aug, 2009 06:34
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I've gotten hold of Giles and he's thinking it over. I'll share his findings later.
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#6
by
stewardc
on 14 Aug, 2009 15:12
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Changed all filters---still the same and getting worse.
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#7
by
stewardc
on 16 Aug, 2009 17:20
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Interesting happenings - I am getting desperate...it's getting worse. Last tank I added 6 oz. of Power Service (white bottle) instead of the recommended 3 oz. I also added 2 cups of ATF. Immediately, the surging is almost completely gone.
More to follow.
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#8
by
Jettage1
on 16 Aug, 2009 18:11
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that is indeed interesting. My surging has remained at about the same level since installing the pump - no better, no worse.
It will be informative to see if your surging stays gone, or returns after you've burned through the tank of fuel with the additives in it.
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#9
by
catlin_cava
on 16 Aug, 2009 19:53
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I think it may just be a sign with those pumps...Hold it to the floor
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#10
by
burn_your_money
on 19 Aug, 2009 19:17
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Sounds like you could have injector problems. Have you had them tested lately? (both opening pressures)
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#11
by
stewardc
on 20 Aug, 2009 07:34
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PROBLEM SOLVED !!!!!;D
It is 100% fuel-related. The next tank I put in a different brand of fuel than I normally use, and added 3 oz of Stanadyne, at Gyles suggestion. No more problem. The surge is gone.
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#12
by
Jettage1
on 20 Aug, 2009 11:13
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Good for you! Not so good for me
My problem has persisted through multiple tanks as well as on both diesel and SVO. (and I installed rebuilt TD injectors from Giles when I did the pump).
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#13
by
stewardc
on 20 Aug, 2009 11:34
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Put additive in the fuel to boost the cetane rating. Multiple tanks of crappy fuel will never cure anything. Only Stanadyne for me from now on !
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#14
by
Jettage1
on 20 Aug, 2009 12:01
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Is Stanadyne an auto parts store item? Course it still begs the question of why the car ran fine with a stock pump but surges & possibly requires this additive with the performance pump...