Ravenous T\A

iTrader: (12)

Well this is a new problem I just got. Saturday I ran my car pretty hard twice, once on the Juice and once off, drove home, it ran fine all that night. Next day I go to the folks house, crank it up still no problems yet, but after sitting at the folks house for about 15 minutes I get back in my car and crank it up and on the way back home I mess with Diesel Ford trying to give me the fly by, car ran fine just like she always does, but when I get to the next stop light my car idles at 2000 rpm for no reason, I turn the AC on and it drops it back to my 900rpm idle, I take off smoothly but as I get past 3000rpms in any gear the car acts like its breaking up then it starts to surge real bad. I get to the apt and sit there listening to see maybe I broke spring or fouled my plugs (misfires) but no SES light came on but my cars temp did continue to rise to about 200 and my car usually sits around 180 max unless my AC is on. I turn the car off and then try to start her and she wont crank. Throw the laptop on it and No trouble codes, no misfires, no nothing?? I wait for about an hour and crank it her up, I had to hold the gas pedal down, she fires up and then runs fine, take her down the road past 3000rpms and she is running fine with no break up or high idle??? Today I go to worjk and all my problems as described are back. What could it be??? Mods are in my sig link, I have a Walbro 255 pump. Please HELP!!!!

InsomZ

iTrader: (1)

go ahead and replace the springs since you were going to anyway.. mine started doing funny stuff w/ spring broke the same day i took it in to swap them out.
surging but my rpm's dropped to 500 bucked then went back to normal.

Ravenous T\A

iTrader: (12)

Yea but my car will run normal after a bit, a broken valve it would do it all the time and it wouldnt act like it wasnt getting fuel

Ravenous T\A

iTrader: (12)

Well I unplugged my IAC this morning after it started to idle surge back and forth, car drove like a champ then but when I went to lunch the car started to hesitate between 2500-3000 RPMs again Gonna Unplug my MAF tonight to see if its bad then I guess I will move on to Fuel Pump issue perhaps and check my Crank trigger wire. What else may cause these syptoms? At WOT car runs fine, but it seems once it goes into Open Loop it starts to mess up, Hasnt overheated yet either, since the TB cleaning my temps tend to stay in its normal range like before. Im also gonna check my timing to see if my car is getting KR and pulling a ton of timing out or something. Any suggestion what else to look for?

618HAWK

iTrader: (361)

Just saw this condition a while ago on friends car. Had a bad TP position sensor. Might take a look at closed voltage and WOT voltage and see what it is doing. It to was a intermittant problem as well.

Have you cleaned your IAC and passage, Might pull IAC and take a look at the pin tail.