78stang

ok ill start from the beginning i have and 86 gt, i did my upper and lower intake manifold gaskets and went to re-time my car and couldnt get it keep running sure enough the cheap gaskets i bought we leaking in the intake valley so i went out and bought the best fel-pro gaskets i could, still couldnt time the car in. then suddenly the fuel pump stopped kicking on so i traced the wires back to the fuel pump relay where it was getting source voltage but not sending voltage out i bought a new relay and still did the same thing so i jumped the wires and the pump kicked on. so now i was getting fuel pressure through the rail but it still wasnt firing so i pulled a plug out to find that it was dry. tested the eec power relay found that bad replaced that still nothin so i tested the injector harness while cranking and got voltage on both the positive and ground side of the circut so i determined that the ecu was bad. i just replaced that and i replaced the plugs. now there is fuel getting into the cylinders whole nine yards but it still wasnt firing so i took everything apart again and when i put the upper intake back on i forgot to connect the vaccum like to the fpr and the one that goes to the tree that includes the brake booster and oddly enough the car started and ran on its own.. it ran like a** but it ran so now i have absolutly no clue what the hell is goin on i hoping that someone on here can give me some leads into what is wrong

javila2468

whats the lastest symptom? is it not idling, idling rough??

78stang

it only idles without the vaccum line on and its really rough like its missing

javila2468

did you connect the vacuum line that goes from the back of the lower intake to the vacuum line tree the driver side firewall?

78stang

yea thats the line i left unplugged and the car ran if i hook it up the car wont run

78stang

like if that line is hooked up i gotta stay on the gas and the car sounds like it has a serious load/ strain on the motor

javila2468

most likely you didn't hook up your vacuums line properly. check this link. it will give you an idea how it goes

http://www.google.com/imgres?um=1&hl...:82&tx=4&ty=65

enix187

You're dumping fuel for some reason, most likely it runs when you unhook the vacuum due to the extra air, do you still have the fuel pump hot wired or is it working off the factory connections?

78stang

its off of the factory connections now

mattdel

did you time it correctly?