1989 Mustang LX 4cyl - Extreme loss of fuel delivery before 2k rpm's
Hello all!
The car is a 89 Mustang LX 4cyl. It has 172k miles on the body, 60k on the engine. I am experiencing a strange loss of power, stalling and loss of my ability to give fuel to the car from a stop. However, these symptoms only last until I can get the car moving to about 2k rpms. Then it has no problem receiving fuel. I have had the water pump, radiator and clutch done in the last 3 months, also these symptoms starting occuring shortly after I cleaned my K&N filter (yes... properly).
I know that it is going to happen when while the car is idling and i see the temperature gauge go up about 2 notches or about 20%, the aux. fan does come on. The car always will start fine, but getting it to move is like pulling teeth and a completely random occurance. After a few tries starting it with my foot on the gas, I can dump the clutch and get it moving, until the next time I have to stop and repeat the process over.
I am not sure if this is an overheating issue, as I have an almost new cooling system, and I do not know if it's the fuel pump as it delivers fuel fine after 2k rpms. I doubt it's the injectors.
I am pretty sure that there is some cleaning I need to do to the sensors, both within them and on their electric counter-parts. Also, I'm going to look into the temp. sensor. I know that when there is cooling issues the ECU goes into dummy/safety mode, but I doubt to the point of the car not even having power at all.
Has anyone had any of these experiences, and if so, what did you do to fix? Suggestions for things to check/clean/replace would be great!
new fuel filter, cap, rotor, plugs, wires
added k&n filter (used)
new radiator, upper + lower hoses
new timing belt + tensioner
new idler pully
new water pump
new clutch
new flywheel
new starter
new battery
new muffler (stock)
I don't know what else to say, it's getting ridiculous.
Last edited by woomis; 09-05-2007 at 08:43 PM.
Reason: forgot to mention k&n was used and was very dirty
Clean you're IAC, gap you're plugs, set you're TPS, change you're 02 sensor, make sure you're timing isn't out 180* and also make sure you're timing belt is lined up
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The sad thing is, with 15 PSI, straight back exhaust, and a bobs log, it still feels slow...
Maybe 20PSI, new computer, new 3" VAM, and some porting will make it faster
I cant seem to find out this information anywhere... what is the Stock timing BTDC on a 1989 Mustang LX 4 Cyl?
Get a repair book,
(from a Haynes 79-93 manual)
1. Bring the number 1 piston to top dead center on the comprestion stroke.
2. Remove the distributor cap and make sure the roter is pointing at the number 1 spark plug wire terminal.
3. Remove the access plug from the timing belt cober, look through the access hole in the belt cover to be sure that the timing mark on the camshaft sprocket is lined up with the pointer.
4. Make sure the timing mark on the crankshaft pulley aligns with the TDC mark on the belt cover.
does it have a funny sound to? mine was doing the same and it ended up being the manifold gasket (no knocking tho weird) and was causing an O2 sensor error
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1993 2.3L LX Coupe
Last edited by Aimbot1; 09-07-2007 at 06:46 PM.
Reason: axd
SOLVED: Timing was WAY off. I have not reproduced the problem this weekend after adjusting the timing, cleaning connectors and changing k&n filters (I had an extra from my 350z).
1989 Mustang LX 4cyl - Extreme loss of fuel delivery before 2k rpm's 
