4.1 EFI XF (LTD) idle problems
Thanks for all the information I have already researched and received through these forums. You guys are GREAT!
Okay my problem. It with my 1986 LTD with the 4.1 efi engine (same as XF).
For some weeks now I have had a really annoying problem with the idle of the car and the general running or the engine. It is on dual fuel, but runs 99% of the time on GAS.
Leading up to christmas, the car when driving, would loose power for a second or two, then behave normal. Just after christmas, I turned around a corner, lost all engine power, the thing backfired, and hasn't been the same since. The idle was rough, it kept momentarily loosing power when driving.
It got that bad on a 3 hour trip, that about 1 hour into the trip, the engine just died altogether. She ran, just really really rough with no power, and backfiring.
Since then I have had 4 mechanics work on the car costing me so far more than $600 (about 80% of which was labour!), and the problem still has not been rectified.
After reading these forums I replaced some sensors etc, but nothing is fixing this problem. Here is a list of what has been done.
New spark plugs
new spark plug leads
replaced cracked gas hoses
replaced idle control sensor
replaced air flow meter (vane)
Gas mixer cleaned and checked
Gas evaporator checked (ok)
throttle body cleaned
Set base idle speed
and she has been tuned four times now, but the problem still exists.
Could it be the computer? or in the electrical some where? You can tell when you are driving it that something is not right. It just dosen't respond like it used to?
I REALLY need to get this fixed! So any help would be GREATLY appreciated.
Thanks all (in advance)