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2003 olds alero 4 cly rpms drop while driving down road

Rpms drop while driving and getting poor gas milage

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If the MIL (malfunction indicator lamp, check engine light) is on,,, stop in autozone or advance auto, and they will check that for free1
if your not sure what to do with the information they give you, stop back here and post the codes along with your question I'll be happy to help you!

Posted on Apr 02, 2015

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Get the error codes read at your favorite auto parts store.
I will guess you have a fuel system delivery problem, which
is affected by a number of devices.

Posted on Apr 02, 2015

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Poor gas milage?


Thinking you are getting poor gas milage,Your engine is running smooth,no misses,Engine runs smooth while accelerating up a hill, Still poor gas milage, Check your tire pressure. I have a 1999 Chevy Blazer 4x4, 4.3 Ltr. Auto, loaded. I have just over 154000 miles on it,I change my fluids every 5000 miles. Summer driving milage got real bad. I drive a Blazer hard. I tow a 16ft trailor usally loaded to the top with wood. Tires get hot in the summer, while in the winter, they stay mostly cool. Always check your air pressure.Most vehicals are equipted with radials now days, So if you think a tire looks low, check it, Usally they low. Usally in the winter months, nobody checks tire pressure. It really does make a difference. I went from 17.2 MPG to 19.5 MPG, while pulling the same trailor loaded with wood. I cut my own wood then stack it in my trailor to sell. I have Good Year Wranglers size: P235/75R/15 I just replace these with new ones. The old ones are going on my trailor. Counted milage on tires are 65000 Miles. Tires were rated at 40000 miles, Under normal use.

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2003 olds alero 2.2 will not start


Try banging on your gas tank if it starts then you can almost be positive it's a fuel pump

Jul 17, 2012 | 2003 Oldsmobile Alero

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I have a 2003 olds alero w/ 3.4l v6. lately the car has issues starting, usually taking three to four key turns to get it going and sometimes i have to hold the peddla down to get it to start and have to...


yes you have a clogged fuel filter and need replace it holding down gas peddle forces debris to bottom of filter and then floats back to top side fuel filter very simpe cheap fix around 25 bucks hour of time

Sep 13, 2010 | 2003 Oldsmobile Alero

1 Answer

Rpms drop at high speed, mo matter how much gas applied.


Most times they will attach fuel pressure gauge and tape it to windshield or whatever is necessary, then run it down the road to duplicate conditions when you experience your problem. Perhaps fuel pump is getting weak and cannot supply enough fuel to maintain higher speeds etc. Have had ones that had proper pressure when cool, but after running a while, pressure drops right off. It's going to be a process of elimination right now, as no codes coming up, so If you have good spark at all times, then fuel pressure is most logical thing to confirm next. Can you include which engine as well, it may help narrow things down a bit too.

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Poor gas milage


Gas milage will vary, depending on the manner in which you drive, also poor gas milage could be due to poor maintenance. Replace the PCV valve, the oxygen sensors, the fuel filter, plugs and wires, and have the injectors cleaned, switch to synthetic oil should improve the milage. .

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Poor milage


roughly between 270- 330miles out of a tank of gas think its like 17.5 gal

Mar 31, 2009 | 2003 Oldsmobile Alero

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'03 Alero engine ust died while driving down the road. Help?


  • see if you can hear the fuel pump click over when you turn it to start position! this may be a fuel pump?

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