more info on hestitation, powerloss. did it again today Options

[mk7celica]

Well I had another thread on this problem and I thought it was my spark plug wires that I just installed because the problem seemed to start right after i did the plug install. Well I thought it was the walbro fuel pump because it gets so loud and the sound keeps changing and getting higher. The problem seemed to be gone until today I floored it to get over and sure enough the hesitation and power loss & jerking began again. Then I drove it for 3-5 seconds and it stopped. So I poped the hood and looked at the engine, wires plugs sensor connections ect, and I found that if I touch my a/c idle control valve and the vacum lines that go to it the car starts to die and then kills. I am thinking when I give wot the engine moves and this is picking up the ac idle valve and the vacum lines like when I touched them with my hand and it killed the same is happening when the engine moves. Any one know about a a/c idle control valve and the vacum lines. Mine has a air sound coming out of it. Its the bolt and spring with vacum lines going to it, not sure the correct name of it

[95st-celica]

check all your vac lines really good...even one vac line disconected or a line cut or a hole somewhere would caus that to happen...is your AC on when you are driving? make sure everything is off, take it for a ride...then turn everything on AC and put it on high and compare the difference between the 2. if your not to worried about ac pull the idle up valve off, cap your vac lines and that will probably solve your problem...if you want to keep the AC..which i would want, then double and tripe check all the lines...EVERYWHERE...behind the block, make sure all the conectors are connected and see if you can find anything...you have to do more then just look at your plugs and wires....check it out really good, and any line that might look like it has some wear to it....buy some stock in vac. hoses and lines and you should be good to go

This post has been edited by 95st-celica: May 7, 2009 - 12:10 AM