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My 2002 Astra 2.2 Sri engine chugs and has low revs when warm nearly cuts out

Hi the engine idles ok when cold once it heats up the revs drop slightly then go back up then down as if it's going to stall

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: car stalling renault espace 2.0 1994

I had the same problem. There are two water temparature sensors located on the housing where the top hose conects to the head. the top sensor is for the temp guage on the dash and the one below is the sensor that needs replacing.

Posted on Jul 16, 2008

TLRogue
  • 99 Answers

SOURCE: 94 L reg clio 16v 1.8 tickover irregularities

Sounds like idle air control valve sticking. If i remember correctly, the idle air control valve is built into the throttle body. This is the part that connects between the air filter and inlet manifold. take this off and clean thoroughly with carb cleaner. if this does not work, then renew part.

TL

Posted on Jan 21, 2009

  • 1 Answer

SOURCE: 98 Isuzu Trooper stalls on cold start, idle issues..

I had the same issue on my 99 Trooper.

It would usually start when completely cold, but idle around 2k RPM.
It would drive fine. But if I shut it down, ran into a store, and came back out, it would start but immediately idle.
Had to ride the gas a little to get it into gear.
The Check Engine light has been going on and off for 6 months or so.

I took this to my local trusted repair shop (no Isuzu dealers within 200 miles).
The diagnosed the light, and found that the Intake Gaskets were bad or leaking.
The idling problem was related to the car not being able to control the amount of air coming in.

They replaced the Intake gaskets by the next day, and I haven't had a problem since. And no more check engine light, which has been on half a year.

Here's some details from my bill:
(1) Intake Gasket set $107.95
Misc materials $21.00
2.1 hours of Labor

The total cost to me was $345.00, and I definately don't feel gipped.

Posted on Mar 06, 2009

csmock132
  • 4669 Answers

SOURCE: Car stalls and chugs when not accelerating

Check engine light?

Posted on Mar 12, 2009

  • 98 Answers

SOURCE: 1997 Daihatsu Charade CS G203 1.5i manual stalling when warm

Check your PCV valve
spark plug model and condition
cracked vacuum hoses
TPS calibration
overheated ignition coil
ignitor
fuel filter

Posted on Apr 27, 2009

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1986 Mercury grand Marquis cutting out when slowing down nearly impossible to start. Oil changed, new air filter, new plugs and wires, new fuel filter...?


I had an experience with a 1984 T-Bird with a 302. The 1986 may have the same system. With that car there was a temperature sensor that affected the idle speed once the car was close to warming up.
With even later models there is a "cold start sequence" which is an electronic way of replacing the ancient choke. The "cold" feature set the fuel mix and the RPM and made starts easier. Now you did not say if the starting problem was when hot or cold or both.

The poor performance when slowing down can be related to the idle rpm being set too low once the thermal switch cuts out. What happens is someone tunes the engine for a rpm that may be correct for the car, but the thermal switch has not dropped the rpm yet. Then when the car really heats up, the idle drops even lower and when you take off your foot from the throttle, the throttle closes too much and the engine cuts out when you are slowing.

Put in a new thermostat. The idle settings can not be set until the thermal switches activate to a run position. Also you may have some vacuum lines crossed which are making the cold and hot cycles reverse. There should be a label with vacuum line routing shown stuck on a part that holds the radiator.

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That sounds about right to me. It needs slightly higher revs on a cold start and then should gradually drop to about 800 when engine has warmed up.

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Chugs, acts like it's not getting gas once warmed up. Idle's fine


This problem can be several things. When your engine is cold, your computer is in a "closed loop" and just pretty much keeps the engine running until warmed up. After reaching operation temperature, the computer starts reading all the sensors. If one sensor is not connected or is defective, you will experience performance problems. Most of the time this will turn on the check engine light, but not always. Second is the fuel pump. This too will cause erratic engine problems.

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