well as some of you know i have asked before and still have no figured out why my car backfires/pops and bucks for the first like 5 minutes when first started, well i was just reading on the corral, that putting a 160* tstat in a 5.0 is not a good thing, because it will not be able to heat up properly,well i replaced the original thermostat with a 160* when i did the cobra intake install, could this be the reason why im having problems, and causing it to run like shit when first started!?
Fox/n.
1. wild animal : a carnivorous animal of the dog family that has a sturdy square body, large cubic inches, a wide RPM range , and comes in many colors. Foxes are found throughout most of the world and hunt alone, mainly at night, relying on cunning and an acute sense of power and acceleration. They feed on mostly small rodents like rats(BBC) , mice (SBC) and snakes(Cobras).
changing the stat would not make a difference on how your car runs on the innital start up .. it will just make your car run cooler and thats always good .. so im told .. ive always ran a 160 in all my stangs and never had that prob
TODAY IS THE DAY I MAKE A DIFFERENCE !!!!!
i always ran 180* but my buddy ran the 160* and i cant recall him having any issues
ridin fast,hittin da hills,throwin some dirt
2003 polaris predator 500
(wanna ride,just pm me!!!)
well what i read said that during initial startup the car will not reach its operating temperature causing it to run very lean...
Fox/n.
1. wild animal : a carnivorous animal of the dog family that has a sturdy square body, large cubic inches, a wide RPM range , and comes in many colors. Foxes are found throughout most of the world and hunt alone, mainly at night, relying on cunning and an acute sense of power and acceleration. They feed on mostly small rodents like rats(BBC) , mice (SBC) and snakes(Cobras).
I will first say that I'm not 100% up on the 5.0 EEC's like I am the 2.3 stuff, but in general.........
Before the ECT reaches a certain point, the Ford strategies are to run off base tables, pretty rich, and fixed timing. In other words, the t'stat shouldnt make a difference on a cold start. If you had a wideband, you would see it that way.
Now if, you was asking why your milage sucks and the car doesent run like it should once "warmed" up................
Bob Myers
so basically its the exact opposite of what my car is doing so let the tstat alone? lol because my car runs like shit cold, but good when warm, and what you just described it should run good when cold, but shitty when warm??
lol
Fox/n.
1. wild animal : a carnivorous animal of the dog family that has a sturdy square body, large cubic inches, a wide RPM range , and comes in many colors. Foxes are found throughout most of the world and hunt alone, mainly at night, relying on cunning and an acute sense of power and acceleration. They feed on mostly small rodents like rats(BBC) , mice (SBC) and snakes(Cobras).
I had 3 fox bodies over the years. All 3 were 160 degree stats. No issues.
2013 GT Premium Auto 3.15 gear
Flowmasters
JLT CAI
American Racing Rims
SCT Programmer with Bama tune
12.33@110
2002 Mustang GT --Sold
should be A'OK with 160 in a 5.0 (4.6 another story) most likely another problem elsewhere
Sounds like the coil breaking down or some other ignition problem, especially with all this rotton wet weather. Could be fuel too though. Has anyone tried to scope the engine when its acting up.
i was kinda thinkin fuel filter??, ill replace that tomorrow, because im also getting horrible gas mileage, like 9mpg city..
Fox/n.
1. wild animal : a carnivorous animal of the dog family that has a sturdy square body, large cubic inches, a wide RPM range , and comes in many colors. Foxes are found throughout most of the world and hunt alone, mainly at night, relying on cunning and an acute sense of power and acceleration. They feed on mostly small rodents like rats(BBC) , mice (SBC) and snakes(Cobras).
is it the stock fuel pump? if so ditch that its probably gettin tired
2013 Mustang GT
1987 Mustang GT
1999 Contour SVT
Does the car have mass air? Could be a connection problem somewhere also and when the car gets hot it starts making good contact. I would check the coolant sensor as well as the air charge temp sensor. I have seen air charge sensors get a piece of carbon on them and the car runs like crap. That problem should be hot also though. Try to look at the grounds and make sure they are clean and tight. Does the car have any mods?
yes, mods are: bbk long tubes, bbk hpipe, flowmaster 40s, stage 3 clutch/flywheel, u/d pullies, cobra upper/lower intake manifold, 65mm tb, 3.73 gears, and a pro 5.0 shifter..
Fox/n.
1. wild animal : a carnivorous animal of the dog family that has a sturdy square body, large cubic inches, a wide RPM range , and comes in many colors. Foxes are found throughout most of the world and hunt alone, mainly at night, relying on cunning and an acute sense of power and acceleration. They feed on mostly small rodents like rats(BBC) , mice (SBC) and snakes(Cobras).
What is your timing set to? Could be the coolant temp sensor also.
i posted on another site already about your problem but ill post it again your pump is taking a shit and needs to be replaced i had the same problem with my 88 initial start up and until the pump got warmed up it would do the same thing your car is doin
Shit, and your sure its the pump? i really dont want to have to do that....and i dont want it to be like everything else, replace it, and still have the problem..
Add:
Well i just put the fuel filter in, and checked for vacuum leaks by spraying starter fluid on all the vacuum lines with the motor running, and nothing happened, so i guess there is no vacuum leaks? but it still idles really rough and still bucks and pops...
Could it b the tps still!?!?
Fox/n.
1. wild animal : a carnivorous animal of the dog family that has a sturdy square body, large cubic inches, a wide RPM range , and comes in many colors. Foxes are found throughout most of the world and hunt alone, mainly at night, relying on cunning and an acute sense of power and acceleration. They feed on mostly small rodents like rats(BBC) , mice (SBC) and snakes(Cobras).
fuel pump ;)
Have you checked the fuel pressure?? I would suggest checking pressure at initial start up, see if fluctuation and/or low pressure is present. Let the car reach operating temp, or whenever it seems OK, then check pressure again. Compare the results. If there are discrepencies, as fastfox91 stated, the fuel pump would be suspect.
Fordstrokers 347 4.030 bore, 3.400 stroke, 5.315 rod, 10.6:1CR
Canfield 195 heads, Ferrea 6000 valves, Comp springs, Ti retainers, roller rockers, hand bowl blended
Camshaft Innovations custom billet core hydraulic roller camshaft
TFS Track Heat, 75mm TB, 90mm MAF, 36lb/hr inj
TREMEC 3550, billet flywheel, RAM clutch, 4.10 gears
how can i check fuel pressure at the schrader(sp?) valve?
Fox/n.
1. wild animal : a carnivorous animal of the dog family that has a sturdy square body, large cubic inches, a wide RPM range , and comes in many colors. Foxes are found throughout most of the world and hunt alone, mainly at night, relying on cunning and an acute sense of power and acceleration. They feed on mostly small rodents like rats(BBC) , mice (SBC) and snakes(Cobras).
Take the cap off of the valve, attach a pressure gauge by threading the fitting onto the valve. Pressure should read between 37 and 40 PSI.Originally Posted by Black87GT
Always use caution when working with a pressurized fuel system
Fordstrokers 347 4.030 bore, 3.400 stroke, 5.315 rod, 10.6:1CR
Canfield 195 heads, Ferrea 6000 valves, Comp springs, Ti retainers, roller rockers, hand bowl blended
Camshaft Innovations custom billet core hydraulic roller camshaft
TFS Track Heat, 75mm TB, 90mm MAF, 36lb/hr inj
TREMEC 3550, billet flywheel, RAM clutch, 4.10 gears
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