Sometimes engine is ticking over at 3000 revs next its coughing and spluttering have replaced the stepper motor idle valve and the air meter and ecu when i had it plugged into the computer it came up with code P1775 car when playing up also has a gearbox fault light on? the car is a p reg 4 litre soveriegn x 300 car does tick over perfectly sometimes please help
An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert whose answer got voted for 20 times.
An expert who has written 20 answers of more than 400 characters.
Re: tick over problem
Sounds like it could be a bad EGR valve, the trans fault codes of p1775 is nothing really, it could even be the fact that you are putting the car in gear at 3,000 revs.
If this is an intermittant problem then it goes right back to the egr valve. They clog and stick and will cause bad/rough idle issues especially on start up and also will cause spiratic idle problems.
a 6ya Mechanic 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 repair professionals here in the US. click here to Talk to a Mechanic (only 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.
The stepper motor responsible for idle air control seems to be be faulty.
Depending on make/model you may need to change either the stepper motor or the throttle body.
Cleaning the idle air valve controlled by the stepper motor can sometimes solve the problem but usually not.
the valve train has nothing to do with the adjustment of the valves , , the ticking sounds like something may be hitting somewhere , when you rev the engine does the ticking go faster or what you have to be more specific on this problem ,
Prognosis is really bad, hate to tell you. Ticking comes from the valve lifters, losing lubrication due to lack of pressure and running dry. At redlights, when revs are at idle, oil pressure drops a lot, and engine really suffers. Have the vehicle taken immediately to a shop for proper diagnose and to see if engine can still be saved. The loss of power comes from the valves not actuating properly. Hydraulic lifters need oil at a decent pressure to "charge" , and if not charged, they will stay compressed, ruining valve lifting operation.
Make sure the idle screw was not turnned causeing tps sensor to read over the spec limit, the next then is to make sure the idle air control valve is working , a bad valve will cause this problem and last is the stepper motor that controls the idle. some of these around this year used steeper idle control motors instead of idle air control valves and in turn the stepper motor is bad it will hold the throtle plate open to much causing the tps reading to be wrong triggering the engine light to come on. the steeper motor will be boltted to side of the throtlebody and theres a small arm to the throtle linkage. i will enclose a stepper motor picture and an idle air valve to show you, but this sounds like the tps is out of range due to this. the last thing is to make sure there are no vacuum leaks, spray crab cleaner around throtlebody base gasket and also the intake mounting gasket and see if the idle changes is so theres a vac leak in that area. good day. okay just did a little research and this truck does have a idle air control valve, the picture is encolsed and is screwed into throtlebody, check that and for vacuum leaks, make sure tps is good sometime it will test good when testing and go bad when it wants, you could have a bad tps and idle air control valve also.
it could possibly be worn valves or valve springs. sometimes worn cam bearings can cause this issue. try using 10w 30 motor oil on your next oil change to see if it helps. sometimes the oil you use can cause ticking because it is not thick enough to lubricate the engine properly. if 10w 30 doesn help the noise, it is possible this problem may be linked to worn parts inside the cylinder head. removing the valve cover will give you a better idea of what could be the source of the ticking.
Most dodge motors have adjusters on the rockers for taking up slack in the valve-train. when these get worn or plugged by dirt they turn the valves from soft hydraulic to hard ticking due to a space between the lifter and the valve. If this is an overhead cam with roller lifters then these have become worn or fouled.
1. Engine on-dissconect the power lead to the [idle speed control valve] located on top of the engine.
2. turn engine off-
3. turn engine on, you may need to use throttle to start and to reach and hold tick over speed. Once tick over is achieved, re-connect the power lead the idle speed control valve.