QuestionHello,
I initially took it in for this power loss problem, accoumpanied by
a "service engine soon" light. It was then that
they couldn't even get a reading on the "reader" and finally found
that the brain was dead.----I ran fine for about a week afterwards and
then started acting up again. I pulled the tank and drained it,
finding no rust deposits that would clog up any intakes, I put
it back together with a new fuel filter. Ran fine for about three days
and then it started again. A mechanic friend said he has the same
motor and that the connection to the engine tempeture sensor unit
may be at fault and to strengthen it. I inspected them to find that
they looked OK and appeared to have been replaced. (this jibes with
what the mechanic shop told me this past time.---------------------
Followup To
Question -
What would cause the follolwing?
when I first start up (cold start) the engine idles rough, there is major clicking coming from a major relay just under the hood (if I disconnect it the engine will die entirely).
Letting it run like this untill warm soesn't help unless I restart, then it seems as if it OK.
However, sometimes it will suffer a major loss of power ( I have to FLOOR it to get it moving from a stop light) but will run smooth. If I restart it it will usually run proper.
I have: replaced the water temperature sensing unit, (not the guage sender unit) Have been told that the wire connector going to the water temperature sensing unit could be bad (and I belive it has been replaced - evidence shows),
have had installed a new brain box 3k miles ago,
a new fuel pump and filter: 3k miles ago, a new fuel filter: 500miles ago.
Also when this happens it is as if it it linked to the transmission, for driving it feels like a bucking horse at times, like the tranny is going to come out.
Any ideas on where to look for this problem?
I havae had it to my mechanic for several h$$ and it is very frustrating....
almost as bad as reading this verrrry long E-mail!
Thank you for reading it. :-) Bruce
Answer -
Did you just purchase this vehicle ?.
What is the FULL repair history ?.
What mechanical work or ANY kind of work has been performed on the vehicle recently ?. As most problems that occur after a recent repair was made can be traced back to the area of where the repair was made as a vacuum line may have been knocked loose or a wire connection came loose, Look around in the area where work was performed.
AnswerIF your problem was wiring problems at the temp sensor it would normally store a diagnostic code and or intermittently FLASH the CHECK ENGINE light ON and OFF periodically. Also the spark plugs would show discolorization of the electrode ends other than the normal light redish color. Did you check them ?.
What your problem is most likely to be is:
1. An intermittent fault in the crank sensor that may or may NOT illuminate the dash light.
2. An intermittent fault in the ignition module that may or may NOT illuminate the dash light.
3. Did you make SURE that the BLACK ground wire that comes from the fuel pump is securely attached usually to the frame of the vehicle as you would have HAD to take it off from the frame of the vehicle in order to remove the fuel tank.
4. New fuel pumps come with NEW wire connectors for the fuel pump and it is highly recommended that these NEW connectors be utilized and or you make ABSOLUTELY POSITIVE that the old connectors are NOT corroded and are a TIGHT fit on the pump connections.
If you have had ANY type of work done on the vehicle inspect these areas of repair for loose wire connections and or LOOSE or corroded GROUND wires.
Does your problem occur when the engine is COLD and before 5 minutes of starting the engine ?.
Does your problem start to occur after the engine has been running for say after 5 minutes and or upon reaching normal operating temperature ?.
When this problem starts to occur, shift the vehicle in NEUTRAL and see if the fault ceases immediately or continues.
Also try the following test while driving the vehicle when the fault is occuring:
1. Maintain your engine speed.
2. use your LEFT FOOT to lightly apply the brake pedal just enough to ienough so you can feel the vehicle braking. BUT MAINTAIN YOUR ENGINE SPEED.
3. IF the fault ceases during this test, Your problem is most likely transmission related.
Let me know the results of the above.
autohelp
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