fuel pressure spec Reply #15 – January 25, 2009, 02:07:07 PM fuel pressure is constant at 42 lbs wether the engine is idleing or driving down the road at wot .it does not fluctuatewith the koeo i get the 2 sec puel pump prime,pressures goes to 42lbs and holds that pressure for roughly 15mins b4 it starts to leak down very slowlymike Quote Selected
fuel pressure spec Reply #16 – January 25, 2009, 08:45:46 PM You did check the fuel presure while driving???? Next up would be to check and verify you have nice bluish white spark. anything short of that points to a TFI or Stator on/in the distributor.BTW,, its an EVP sensor but i get what your saying though. Your CFI base plate could also be broken but you did not meniton if you idle a little high or had to recently back down the idle.also, the CFI base plate itself could be carbon clogged and therefore it will not actuate the evp properly. Quote Selected
fuel pressure spec Reply #17 – January 25, 2009, 09:47:14 PM yea yea that was while driving,i sprayed around the intake , baseplate gaskets with carb/choke cleaner and didnt get a change in idle speed,still idles at 15-16 in of vacumi have a good clean spark,all the secondary ignition componants have been replacedi am kinda leaning toward the egr valve,after i cleaned the passages out i could still blow some air threw the ports even tho it was closedi havent touched the idle speed,but it does idle a little lowmike Quote Selected
fuel pressure spec Reply #18 – January 25, 2009, 10:24:13 PM look down in the distributor where the metal fins pass through the stator. ther eis a manget on the inside part of the stator.remove the metal fin device and see if there are metal chips or debris on the magnet.If you have good fuel, good spark, no vac leaks along the cfi, then you problem must be mechanical that would not generally trigger a code. The ACT sensor has a little tear drop part that gathers air flow info and converts that to an eec input. See if it is dirty and clean with a decent evaporative cleaner.I suppose next would be a compression test. Quote Selected
fuel pressure spec Reply #19 – January 26, 2009, 11:07:37 AM yea compression check yeilded 140 across the board ,the distributor had some corrosion powder down inside ,everything else inside was cleantiming is sitting at 7* as per the sticker,timing doesnt jump aroundmike Quote Selected
fuel pressure spec Reply #20 – January 26, 2009, 12:22:53 PM do you have the duraspark ignition system? Quote Selected
fuel pressure spec Reply #21 – January 26, 2009, 12:37:37 PM tfi?has the ignition module on the side of distributormike Quote Selected
fuel pressure spec Reply #22 – January 26, 2009, 02:50:29 PM Quote from: joker77_2005;253695timing is sitting at 7* as per the sticker,timing doesnt jump aroundmikeIs this with the SPOUT disconnected? Quote Selected
fuel pressure spec Reply #24 – January 27, 2009, 10:22:41 PM well then,, theres only one thing remaining.PUll the cfi and chip away at the carbon buildup under there. Thats all thats remaining. either that or your injector screens are clogged up even though you've probably looked at them pulsing.If your getting 42 psi while driving and it does not move when the transmission is shifting, then you are the only one on earth with a stock 60lph bosch pump that does that. Obviously the pump is good, however, using the pics I posted, you could install a better pump in the tank along with minor wiring mods to get a SC pump to work. I do not have that exact wiring diagram for your two pump setup but Softtouch probably does.If your getting nice blueish white spark, then your ignition is good.If your compression is even and such then everything is sealing up good as far as rings/valves go.Your vac pres reading could be misleading because of were you are taking it. It might be helpful to undo the vac line leading to the rear CFI gold fitting and plug it off. get the car started and see if that fitting is sucks air.If the CFI has never been off, its time to pull it and clean anyway. while you are at it, take it apart and yank the injector screens. Can you rig up a little bulb / bulb socket with pigtails to each injector connector and crank the engine so the light blinks consistantly?-ie power delivery to the injectors in even strobes.Also, when the car is shut off after you got it running, fish you a paper towel under each injector for a few minutes and check on it later to see if fuel dripped with the car off.What color are your injectors??dark blue like? If they are green, then let me know.BTW, dont unplug / replug the sprout with the car running.I believe you have that one odd ball CFI which has the old carb like automatic choke pull off on the pass rear side,, correct?If so, then you dont have an idle control motor but a vac operated plunger on your trottle linkage driver side. Quote Selected
fuel pressure spec Reply #25 – January 28, 2009, 01:27:22 AM yea i have the odd ball cfii pulled the cfi off and it is pretty dam clean and shiny,as is looking down into the intake...no carbon buildup at alli am taking vacum readings from the brake booster line port on the intake/cfifuel injecters dont drip after the engine is shut off,holds fuel pressure for at least a half hour...i checked after a hour and had about 15lbsa noid lite on the injecter connecters shows even pulsesboth injecters have a nice clean wide spray patternengine has no blowby ,capping off the pcv valve has no effecteven the egr plate had very little build up to clean offi did order a new egr valve as the old one ,the plunger did not seal up airtitei borrowed a borescope/cam from snap on and took a peek in the plug holes,pistons and walls look fairly nice.i/e no carbon buildupshould the fuel pressure stay the same,or should the pressure drop some at idle and then go back up off idle,like the fox mustang efi?i am not wanting to turn this into a hot street car yet,i have a 89 stang that does low tens, and a 89 cougar 5.0 5speed that i am finishing upmike Quote Selected
fuel pressure spec Reply #26 – January 29, 2009, 02:26:33 AM mustang,tbird,coug,, its all EEC.The fuel presure what? you said it was rock steady.It should drop a little when you apply throttle but recover while holding a steady rpm range.example,, you work the linkage up to xyz throttle and hold it there. The fuel pres guage will drop a little then steady out / recover to about 40psi.Now driving will produce more of a drop when you watch the guage. I know you didnt say the fuel presure was doing this ,, you are only asking "should" it do it.I am wondering why you are asking. Quote Selected
fuel pressure spec Reply #27 – January 29, 2009, 10:03:18 AM well i checked fuel pressure on all my other fords and at idle i have around 32-35 psi of fuel,driving down the road under load with throttle the pressure ramps up to 42-48psi,and under deccel i have 32-35psi.so what makes the old cfi differ for fuel pressure?btw i wanna say the injecters are a lite greenmike Quote Selected
fuel pressure spec Reply #28 – January 29, 2009, 12:52:29 PM Now we are getting somewhere...........Like the color green I show on post 4 or whatever? Those have never been inside of a 5.0CFI. You lack fuel delivery by nature of thier flow rate.Yours should be blue tops, green tops are for v6 cars, uless they are equal to or aftermarket, I cant explain why you have green tops. Go to my diy link or jump to the thread below.http://www.foxtbirdcougarforums.com/showthread.php?t=22388&page=3For your high tps voltage at idle,, remove the tps and use a round or "chainsaw file to oval the holes. Remount and snug only the screws down. Rotate the tps or adjust it until you dial in .6v - .9v DC.you having over a volt is not correct but is on the boarder of acceptable limits.Later CFI units will have a 1/4'' x 1'' long gold elbow fitting near the driver rear cfi mount. Since we have just discovered yours is the earlier or "first breed" CFI, I can see now why you dont have carbon build up. Your CFI and the later verson appeared on 84's so there are two types for that year. I am starting to wonder if you are EECIII instead of EECIV. Quote Selected
fuel pressure spec Reply #29 – January 29, 2009, 02:22:50 PM the emission stcker on the fan shroud says eeciv Quote Selected
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