Last post on Aug 13, 2013 at 5:42 PM
You are in the Chevrolet Impala
What is this discussion about?
Chevrolet Impala, Sedan
Apr 04, 2001 (5:53 pm)
Regarding the Impala owner who has the engine hesitation...... Was there ever an attempt to clean the "Throttle Body" ??? I have a very strong feeling that the hesitation your car is going thru is due to an air filter fiber on the element of the Trottle Body. This same problem happened to my wife's Buick. Mr. Good Wrench checked everything on the car, and finally did a throttle body cleaning..... the hesitation was gone after he sprayed the trottle body. All it takes is a little dirt or fiber from the air filter onto the element and that will make the engine hesitate big time. Give it a cleaning. Let me know if my hunch was correct. Goodluck
#2458 of 13621 platour on 3.4L
Apr 04, 2001 (6:00 pm)
I'm glad you got some discussion going on 3.4L because I didn't know about the aluminum gaskets on 3.4. I asked my dad (the more knowledgeable one on cars) and he said to try and avoid aluminum. I assume the 3.8 have steel. I looked up on CarsDirect just to get a ball park figure on getting the 3.8L and it's about $1,000. I may wind up spending the extra. And I thought all my questions were answered on the Impalas! I'll keep reading the posts for more insights.
#2459 of 13621 Fuel Capacity
Apr 04, 2001 (6:31 pm)
I read somewhere that the Impala has a fuel tank capacity of 17 gallons. Normally, I pump gas when my tank is at the absolute empty (I know I shouldn't do that). However, I'm only able to top off at 15 gallons max. Is the 2 gallon difference because of the reserve tank?
My LS has approximately 2K miles on it. It is already broken in. On a full gas tank, I'm only able to get 300 miles (highway and city driving) by the time the warning light comes on. Thus, at 15 gallons divided by 300 miles, I average only 20 mpg? My LS does not come with the fancy fuel calculations meter.
Has anyone tested how many miles they get from absolute full gas tank to the absolute empty tank? This is assuming 50% city driving and 50% highway driving.
Apr 04, 2001 (6:39 pm)
Yes, the 3.4L has aluminum cylinder heads and the 3.8L has Fe/ iron. Now, I do not know why GM chose these combinations and the relative reliability of one vrs the other. In other words, why not Fe heads on the 3.4L? Certainly, in my experience, iron-on-iron gives the least aggravation. But again, I need to hear from the tech people. Why is GM using Al heads on the 3.4L?
#2461 of 13621 platour on aluminum
Apr 04, 2001 (7:56 pm)
My father has done all my car repairs since I was a teen (except transmission work). While not being a mechanic, he still knows a few things about cars. He says aluminum corrodes more easily allowing water to get into cylinders and causing engine damage. I may not be quoting him exactly but am somewhat close.
It certainly doesn't make since to use aluminum on one and iron on another. Although I think the price difference with the base and LS is around $3-4000.
#2462 of 13621 Fuel Capacity: Hvan3
Apr 05, 2001 (4:40 am)
I got my '01 LS in November. Here in Michigan it's been colder'n'heck ever since, so I haven't seen the stellar mileage the others are talking about. I just filled my tank from "warning light empty" after almost exactly 50% highway and 50% city driving, and I got about 25 MPG. I've had tanks that were 100% city and I got about 22MPG. I've gotten as high as 29 when completely on the road. I'm hoping for a few higher in the summer, as all my cars do better when it's warm.
Sounds like yours is running a little low. Might indicate a tuning problem of some sort, as I never got 20 on a tank. This can be a function of how you drive too, though. I take it pretty easy on mine most of the time.
Break-in is a relative term too. I know they suggest not flooring it for the first 500 miles. However I don't consider a car truly "broken in" until 100,000 miles. Not many people think like I do though...
To the folks who are getting "stellar" mileage: how much has the mileage improved now that you have 15-20K miles compared to when you had less than 5K?
#2463 of 13621 Impala Police Vehicle - with a twist
Apr 05, 2001 (5:26 am)
Yesterday I finally saw the city of Guelph's police Impala - tricked out as a Canine Unit! The dog rides in a specially designed cage in the back seat. Has anyone else seen this?
I'm seeing more and more Impala police cars on the road in southern Ontario. On Hwy 401 between London and Windsor the plain white Impala seems to be the radar car of choice for the Ontario Provincial Police.
#2464 of 13621 platour, how did you find out about...
Apr 05, 2001 (7:47 am)
the aluminum head gasket. They don't ever have that information on specs. I wouldn't mind looking at other cars as well to see if they are steel or aluminum. It's one thing to pay $1000 for the 3.8 engine but I may also have to buy an option package to get the engine. There comes a point where it gets too expensive. I'm just looking up info on GM Power right now. Would have to talk to a salesman to get bottom line on all this.
#2465 of 13621 Stnel
Apr 05, 2001 (8:02 am)
The 3.4L V6 has an Aluminum head. The 3800 Series II V6 has a Cast Iron head.
If you want to get more detailed information, just go to:
In there, you'll find very detailed information about each engine and transmission units currently produced by General Motors.
#2466 of 13621 Lifetime coolant
Apr 05, 2001 (8:08 am)
A while back we were talking about coolant levels and the "lifetime" coolant GM puts in there cars. Many of you thought that sounded suspect... and it appears you were right.
Please see the maintance and repairs folder of the Impala Owner's Club link for a long-ish post I'll place there from our local car/guy columnist for the paper. And please people. Get your coolant/antifreeze levels checked at least once a year no matter what your owner's manual says...