2007 Impala engine question
Thread Starter
Teching In
Joined: Mar 2013
Posts: 6
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From: Wisconsin
2007 Impala engine question Hi,
Just purchased an 07 with just over 100,000 miles on it. Had the tranny flushed, plugs and wires changed, new tires and cam bolts put in on all 4 corners. Notice under hard acceleration from about 10mph that between 3500-4500 rpm the engine will cut out for a brief second. Traction control is off. This is very noticeable. Seems like you hit a rev limit or something. I thought fuel pump at first, but there is no lag, it cuts right out. Is this programmed into the computer to do this?
Thanks,
TZ
Just purchased an 07 with just over 100,000 miles on it. Had the tranny flushed, plugs and wires changed, new tires and cam bolts put in on all 4 corners. Notice under hard acceleration from about 10mph that between 3500-4500 rpm the engine will cut out for a brief second. Traction control is off. This is very noticeable. Seems like you hit a rev limit or something. I thought fuel pump at first, but there is no lag, it cuts right out. Is this programmed into the computer to do this?
Thanks,
TZ
Hi,
Just purchased an 07 with just over 100,000 miles on it. Had the tranny flushed, plugs and wires changed, new tires and cam bolts put in on all 4 corners. Notice under hard acceleration from about 10mph that between 3500-4500 rpm the engine will cut out for a brief second. Traction control is off. This is very noticeable. Seems like you hit a rev limit or something. I thought fuel pump at first, but there is no lag, it cuts right out. Is this programmed into the computer to do this?
Thanks,
TZ
Just purchased an 07 with just over 100,000 miles on it. Had the tranny flushed, plugs and wires changed, new tires and cam bolts put in on all 4 corners. Notice under hard acceleration from about 10mph that between 3500-4500 rpm the engine will cut out for a brief second. Traction control is off. This is very noticeable. Seems like you hit a rev limit or something. I thought fuel pump at first, but there is no lag, it cuts right out. Is this programmed into the computer to do this?
Thanks,
TZ
TECH Enthusiast
Joined: Nov 2008
Posts: 622
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It should only do this if the tires break loose or if the wheels are turned. This can be tuned out but not the differential anti-score, which will occur under conditions where one wheel breaks loose and exceeds 40mph over the other axel. For a tuning option contact: http://www.diablewtune.com/
It should only do this if the tires break loose or if the wheels are turned. This can be tuned out but not the differential anti-score, which will occur under conditions where one wheel breaks loose and exceeds 40mph over the other axel. For a tuning option contact: http://www.diablewtune.com/
Thread Starter
Teching In
Joined: Mar 2013
Posts: 6
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From: Wisconsin
I think it may be the mass air flow sensor. Going to clean it Monday and if that doesn't work replace it. Today it started missing when I would hit bumps in the road.
Good info guys, appreciate the help
Good info guys, appreciate the help
(plugs wires etc) ?
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Thread Starter
Teching In
Joined: Mar 2013
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From: Wisconsin
Plugs wires all new. No hard shifts. Just a cut out at around 3500-4500 when on the gas hard. I did notice crossing a railroad track friday the car cut out, so that is confirming the mass air flow sensor theory. Getting it cleaned tonight and if that doesn't work replacinng it. I'll keep you posted on what I find.
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Verdad Gallardo Plugs wires all new. No hard shifts. Just a cut out at around 3500-4500 when on the gas hard. I did notice crossing a railroad track friday the car cut out, so that is confirming the mass air flow sensor theory. Getting it cleaned tonight and if that doesn't work replacinng it. I'll keep you posted on what I find.
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From: CT
which shouldn't be done... just like tranny "flushes" - should never do a flush either... just drop the pan, drain the fluid, change the filter, then put in new fluid...
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06MonteSS / DiabLew Tune
2014 Camaro 2SS/RS - LS3, 6-speed manual, short-throw performance shifter, NPP dual-mode performance exhaust, 1LE front splitter, ZL1 rockers, Z28 Rear Spoiler, all paint-matched Red Rock Metallic, BMR strut tower brace, Cold Air Inductions cold air intake, Apex Motorsports, Inc. catch-can, Custom DiabLew Tune
www.diablewtune.com -- www.diablocustomtune.com -- www.diablocustomtunegm.com
OK I don't follow you on that one there are numerous threads where you said you had it off or never said to not to turn it off. Why now?
Thread Starter
Teching In
Joined: Mar 2013
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From: Wisconsin
Being I just got the car, not sure what the mileage should be. Right now it is around 19-20. Pulled the mass air flow sensor last night and it was dirty and did have some burn scoring on it. Cleaned it up with some CRC mass airflow sensor cleaner. The car does change idle when tapping on the MAF with a rubber mallet. Going to drive it a couple days to see if there is a change and then change out the MAF.
Since I got the car I have replaced all plugs and wires with AC Delco, new filter, oil change, tranny fluid change and filter, put cam bolts in all around for camber problem. Car runs and idles well, just this inadvertent cutout. Also the car will kill on a bigger bump.
Since I got the car I have replaced all plugs and wires with AC Delco, new filter, oil change, tranny fluid change and filter, put cam bolts in all around for camber problem. Car runs and idles well, just this inadvertent cutout. Also the car will kill on a bigger bump.
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It is most likely your MAF as you say there is visual heat damage, the sensor inside has a self cleaning feature in which it reaches some where around 900* to burn off any impurities (it may have shorted) or been over oiled or touched buy a single finger causing a hot spot and failure. Tapping on it should not change your idle stability at all.
Oh and it is an 07 what?
Oh and it is an 07 what?
Thread Starter
Teching In
Joined: Mar 2013
Posts: 6
Likes: 0
From: Wisconsin
It is most likely your MAF as you say there is visual heat damage, the sensor inside has a self cleaning feature in which it reaches some where around 900* to burn off any impurities (it may have shorted) or been over oiled or touched buy a single finger causing a hot spot and failure. Tapping on it should not change your idle stability at all.
Oh and it is an 07 what?
Oh and it is an 07 what?
