81 codes 30 27 help

Car starts but only wont stay running step on gas and it dies , or dies after 30 sec. Codes 27 & 30 how to fix ? replaced tps ips did not help.

Would be helpful to know what year type of car you have? What is a IPS? put year and type of car in your signature profile please.

Code 30 is the ISC circuit problem and the 27 is the Open throttle switch circuit.

The problem of stalling is usally not related to these codes unless your idle screw is set too low. Engine stall problems are usually caused by poor connection in the black and yellow signal wire between the fuse block and the ECU, poor connection in the wiring or on the body of the engine coolant temp. sensor, also check EGR wiring and function.

Sorry it is a 1981 Eldorodo , there is know black&yellow I looked real good . checked wireing dirgram in my book not there eather.?

You might check a dictionary, could help. I still dont see year and type of car in profile. We are here for free, to help. So, Information is most important to get to the bottom of a problem. I think I''ll let someone else help further.

You have not helped anyone here anyway. Dont know the answer ,make fun of there spelling. Go get a life. We are here becouse we need help , not made fun of.

Does your book have or do you know how to use On-board Diagnostics?

Hey Harley:  Was looking under Deville when I responded to your question, so now that I know it''s an Eldo the reference wires that you will be looking for are Red/Black or Purple/ white. I noticed that you were also questioning your fuel pressure, when I changed the fuel pump on my 81 Fleet. it made a big difference. Got ahold of a Turbo pump which is supposed to be better than OEM<.  Hope this helps. Have you investigated your pickup coil and distributor module??