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07-12-2017, 06:54 PM
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#1 |
 
Drives: 2012 ZL1 Silver Ice Join Date: Jan 2015
Location: United States
Posts: 47
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Requesting input on surging problem
This just started last night. Car is a 2012 ZL1 auto bone stock. When starting out (in either M or D mode) when care hits about 20mph it bucks fairly hard. I thought it was the trans shifting into 3rd but, when I go to M and put it in 2nd and leave it there, it does the same thing. Then when cruising at 38 to 40 the car surges as rpms jump up and down about 200 or so (not moving throttle at all). This surging is continuous until I speed up. When I speed up it runs smooth and when accelerating hard from a stop there is no surging.
No codes are showing. Any input would be greatly appreciated. Thanks Alan |
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07-12-2017, 06:55 PM
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#2 |
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Team 913
Drives: '14 ZL1, '15 Jeep GC, ‘22 Ram 2500 Join Date: Apr 2015
Location: USA, Central CA
Posts: 1,119
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Maybe the MAF
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07-12-2017, 08:03 PM
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#3 | |
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Sarcasm loading --------
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Quote:
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"The salesman actually told me to stop getting it sideways during the test drive"
2018 MBM ZL1 1LE - Stock 2014 CRT ZL1 574 rwhp, 537 rwtq - SOLD 2010 IBM SS Camaro VVT L99 w/ TR6060 swap, 489 rwhp, 444 rwtq - SOLD |
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07-12-2017, 11:08 PM
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#4 |
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Big Crow
Drives: '13 ZL1 Join Date: Mar 2017
Location: California
Posts: 1,489
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Maybe check your fuel pressure
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07-13-2017, 12:43 AM
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#5 | |
 Drives: 2013 Camaro ZL1 Join Date: Oct 2012
Location: SF Bay Area
Posts: 325
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Quote:
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07-13-2017, 01:39 PM
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#6 |
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Drives: 2012 ZL1 Silver Ice Join Date: Jan 2015
Location: United States
Posts: 47
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Thanks for the replies. Taking to dealer on Monday to get it looked at.
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07-13-2017, 02:20 PM
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#7 |
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Tri-County Camaro SWFL
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Throttle position sensor on the TB.
Your description is exactly what was happening when mine went bad.
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Last edited by CamaroDreams76; 07-13-2017 at 02:39 PM. |
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07-13-2017, 02:26 PM
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#8 |
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Drives: 2012 ZL1 Silver Ice Join Date: Jan 2015
Location: United States
Posts: 47
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That makes sense. Thanks.
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07-13-2017, 02:42 PM
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#9 | |
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Tri-County Camaro SWFL
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Quote:
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07-13-2017, 04:33 PM
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#10 | |
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Big Crow
Drives: '13 ZL1 Join Date: Mar 2017
Location: California
Posts: 1,489
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Quote:
Update: Maybe it's built into the throttlebody now and not quite as cheap and easy to fix https://repairpal.com/problems/chevrolet/camaro+zl1 "throttle position sensor notorious for failure". But not so hard or expensive either, I'd give it a try myself if I didn't have a warranty and MAF cleaner spray didn't fix it. Last edited by silversleeper; 07-13-2017 at 05:10 PM. |
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07-15-2017, 06:40 PM
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#11 |
 
Drives: 2015 ZL1 Join Date: Apr 2014
Location: Sarnia, Ontario, CANADA
Posts: 3
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Having what seems like the same problem with my 2015. If you set it on cruise at 57 mph, does yours also hunt up and down in rpm? Just a couple hundred.
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07-15-2017, 07:34 PM
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#12 |
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Drives: 2012 ZL1 Silver Ice Join Date: Jan 2015
Location: United States
Posts: 47
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Exactly! Except it is doing it at 40 or so. Last night went for a ride; same symptoms until I was almost home then they all went away. Drove today and all was perfect.(?) Still going to take it in to get it checked out.
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07-16-2017, 08:46 PM
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#13 | |
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Tri-County Camaro SWFL
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Quote:
https://www.rockauto.com/en/catalog/...sor+(tps),5136 Edit: LSA TPS looks like its held on by some little metal clips.
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