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Followup To
Question -
sir ,
i sent my concorde 2000 Lh 2.7 engine , to service from 2 weeks ,
when i get it back , i found that
some times when i try to accelerate (RPM reaches 3) it hesitates and rpm drops to 2 or 2.5
the service i did is
change oil filter and oil
change hear termostat
change water houze.
i hope u can help me casue i will travle with the car next week and i afired some thing bad happen while drive ,
thanks for resopnse.
Answer -
Hello Hussien,
The only item that was serviced that might cause a hesitiation is the engine thermostat. If the temperature of the engine is too low or too high it could produce this effect. Where is the temperature gauge needle positioned when this happens? If it is at one extreme or the other then I would suggest that you go back to the shop where the thermostat was replaced and ask them to verify that the correct thermostat was installed.
Has the "check engine" light come on at any time while you are driving? If so, that would indicate that the engine control computer has recognized the problem, identified it with a code number, and stored the information in the memory. The shop can readout the memory to determine what might be wrong. So have that readout done if the light has come on while the engine is running.
Otherwise, I can't identify a specific reason for the hesitation without examining the car myself. But the temperature gauge needle position and a code readout may lead you to the reason.
Roland
SIR ,
the temperature gauge needle points exacttly to the middle , and i did ask them aboout it but they said its normal temperature ..
but i need ur opinion
in my car model whats the optimal temperature should be ?
AnswerHi again, Hussien,
I think middle of the gauge is fine, no problem. I can't think of anything that they could have done to cause such a problem. It may be a coincidence that the problem developed about the same time as you had the car serviced.
So the question is what to do? I would be observant for the "check engine" light to come on after you have the engine started and while you are driving it. If you observe that then you would have a reason to go to a shop that has an engine fault code reader and have the engine computer memory asked to tell what fault code it has recorded. Some faults only cause the light to come on briefly, so you may not have noticed it. If you want to spend about $40 you could do a readout now and see if there is any stored code. If you do, ask what is the code number, what is the name of the code, what are the possible repairs, how much they estimate the repairs to be to correct that problem. Then if you wish, write back to me and tell me that information and I can give you some advice. So ask around or watch for ads in the newspapers advertising a "engine code readout" for about $40 and invest in that service. With the very modern and complex engines it is very difficult to troubleshoot a problem without first doing a code readout. If there is no fault code, then I can suggest a couple of things (clogged fuel filter, clogged egr valve as possible reasons for hesitation on acceleration. So if you haven't changed the fuel filter or had the egr valve evaluated that might be another way to spend some money to try to eliminate the hesitation.
Roland
