for the past week my car has ran like *#*$, and not only $*#@ but different *$#&. The car will start and turn over.... only to drop idle, increase idle... drop idle.... in a cycle... chug and then die. sometimes the idle will be fine when u start it up and its a cooler day outside. if it'll start up when its a cooler day outside and u press the gas... it does the same thing. sometimes it'll start up you can drive... gives you the image that its fine... only for it to completly die out when u come to a stop sign or traffic light. I have changed the MAF sensor.. IAC valve.. Fuel Filter... checked the fuel pump (which as about 41 PSI pressure) checked the TPS sensor which was right on the money (voltage wise).. had someone check the ignition module (advance auto said it was fine) and i have changed the ignition coil with no luck. Can someone please help me before this damn car nickels and dimes me to death? i get no engine codes and i dont know what in the world to do.. i've adjusted the timing and now this car even has me rambling.... all help appriciated. Thanks

 

Check all your vacumn hoses , sounds like you may have a leak .

Im sure you have checked this , but just making sure . What about cap and rotor ? plugs ? wires ?

 

i have redone the plugs/wires the cap and rotor... i checked all visible hoses.... think of any i could be missing? and wouldn't a vaccum leak come up on the code reader? Thanks again

 

uh , I dont know if it would or not . did you check the vacumn hose on the back of the manifold ?

 

loping is usually caused by a bad EGR valve. If the timing seems to be jumping around then check the pickup coil in the distributer(the little magnetic coiled thing with the six contact points. the coiled wire part of it may need to be changed, they go bad from heat.

 

If any of the above things don't solve it, I would recommend replacing/cleaning your injectors.