When the car is started from cold the choke cuts in but sends the revs to above 2000rpm,takes quite a while to settle.When it warms up the tickover is not too high and acceleration seems smooth.Is this related to the problem of the revs been very slow to drop off when changing gear.I could understand it doing this while the choke was still on,but it continues even when upto temp'.The revs actually rise 100 - 200rpm after taking foot off pedal when accelerating to change gear,and the higher the rpm before changing gear the more incresed the problem.I've checked the accelerator cable for any sticking and it is not that.also the airffilter is clean.
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
If you have a hih miles truck,it is very possoble you have aclogged cat.Have a muffler shop test pressure in front and behind by drilling small holes,checkin w/gauge,then welding back.This should be free if you replace the cat.
84 Is what is called on OBD 1 on board dianostic system . The vehicle is carborated So you should check the heat risers first . There are two of them one on each side of the engine inside of the exhasut manifolds . There are flaps controled by a bimatilic spring on each side inside of the exhuast stream if bolth or one is stuck shut the exhuast can't get out of the manifold and the engine woun't run . The other thing that it could be is the electric chock has a bad connection or has gone bad you would need to check this at the electrical connector to the choke to see if its getting 12 volts . IF you get voltage then the choke is NG also look at the pisition of the upper choke plate it should be closed when the engine is cold and then gradualy start to open as the engine warms up this controls the amount of air that can get into the air intake . S o when the engine is cold it needs more fuel and less air so the plate is closed but when the engines worms up it needs as much air as it can get to run faster Well i hope this helps you
It is quite common for most cars to have an increased rev range when a engine is started from cold, as the temperature increases the revs will drop down. Depending on the age of the car has a lot to do with it also, as older cars used an auto choke system until a warmer temperature was attained. More modern cars don't neccessarily need extreme higher revs, but still operate with a thermostatic controller, that regulates the fuel flow via the fuel injection system. before you do anything, consider 1/ You have to know also what rev range does the car operate at when its been running for a while, eg when its warm and idling does it rev at 600,800,1000. 2/ Make sure you don't have your air conditioner on when starting, as this increases revs also. 3/ How long is the increased revs lasting. 4/ Is this car a carburated model or fuel injection 5/ have a visual and check that there are no small vacuum pipes that have come off anywhere around the intake area of the motor. (Intake area can be found where you accelorator cable ends up. 6/ failing that when your car goes for its next service, bring this problem to the mechanics attention. it can be difficult to diagnose problems like these unless your looking at the engine.
if that 2000rpm is start up from cold,,,its still a bit high! but only a bit,,,should be nearer 1500rpm cold out of gear,,,,
when warm it should run at about 850---900rpm-----out of gear-
950rpm for an auto out of gear,,
in gear an auto will drop to about 850rpm so that the motor wont stall when holding the brakes down i would take the car back,, but they may wont it over night so they can set the revs up from cold,,i have a felling that auto choke is still playing up a bit
turbo is malfunctioning the turbo waste gate is not working take it to a shop right away, preferablly tow it so as not to damage the engine, if the exhaust gas's gets near the turbine bearings you will burn up the engine and the turbo cna explode like a hand granade and destrou your enging.
Check the coolant temperature sensor. It is situated in the inlet manifold at the back of the engine bay. This basically acts like an automatic choke and tells the ECU to increase fuel mixture when the engine is cold.
I replaced many many of these to Renaults, Peugeots and Citroens for this exact fault.
I have a similar problem which seems to stop ,if after 20 mins of driving or warmed up engine if you stop for 10 mins the revs die to a more normal 1500 revs! it is a spanish car now living in theUK I think the problem is choke related.