Weird throttle behavior , Lanos 1.4i year 2000

jlagu · Post by **jlagu** » Fri Jun 23, 2006 6:34 am

I've got a Lanos 1.4 date 11/2000 , it only has done 35000 Km.
The problem is that when I accelerate, the engine hesitates for one or two seconds until it reaches a least 2000 rpm.
It seems to have no power at all under those revs. When I change gears up (manual trans),
the rev meter jumps a fev revs up instead of proning to go down as usualy does in any car.
It becomes a quite dificult to drive the car smoothly.
Any suggestions.

I haven´t change the fuel filter or cleaned the TB. Could this be the problem??

Tanks for your answers.

Update :
1- Car/Engine/Transmission type. Daewoo lanos 1.4 etec SOHC /5 gear manual

2- kms/miles on the car. 35000 Km

3- Ignition system serviced kms (spark plugs, spark plug wires, coil pack). New spark plugs with 20000 Km Bosch 4

4- Fuel system serviced kms (injectors, filter, pump). No Service yet

5- Air filter serviced kms.

6- Engine mods list if available. No mods

7- Exact description for the problem. Described above

8- Associated characteristics for the problem (eg. Does is happen when the car gets hot, goes over 60 mph, turning left, A/C on,etc...) , Happens when you start to drive or the revs go under 2000 rpm more or less.

9- CEL status (on, off, blinking) and preferably the DTC code you got after the OBD scan in case the CEL is on/blinking. NO nothings on.

10- Any recent engine service done, even if it is a very routine one. Last service was oil/filter change last year with 30000 Km. Don´t use this car that much.

lanowoo · Post by **lanowoo** » Fri Jun 23, 2006 9:33 am

it could be the fule filter and tb, but in a way, it seems electrical or sensor-ish change them and see. then post the outcome.

MMamdouh · Post by **MMamdouh** » Fri Jun 23, 2006 9:37 am

http://www.daewootech.com/forum/viewtopic.php?t=5863

MMamdouh

jlagu · Post by **jlagu** » Fri Jun 23, 2006 9:38 am

lanowoo said:
"it seems electrical or sensor-ish change them and see. then post the outcome"

Could you please specify, what do you mean?
What kind of electrical problem? spark plugs,cables ...
Which sensors should I have a loook at ? tps , iac ...

MMamdouh · Post by **MMamdouh** » Fri Jun 23, 2006 9:44 am

it could be all what you said and it could be none... we won't be able to tell unless we get more feedback on your engine's service history.

MMamdouh

lanowoo · Post by **lanowoo** » Fri Jun 23, 2006 7:43 pm

oh and also make sure that all vacume lines and connectors are tight, the engine vibration/ or rougher idle speed below 2000rpm could be shaking an connector or some wires that can make it operate shotty. and i have had experience in that problem by a loose connector at the fuel filter, not enough to leak but enuf to suck air.