I would check the press. You shouldnt have to change it BUT since the old pump has been going out it wont hurt to double check the press.
Did you verify you are getting power near the inertia switch? No sense in going through all the hassle of changing a pump if you do not need to
I bought a volt meter this evening so tomorrow my stepdad and I are going to check the volts to the relay and the inertia switch Also when the car was running a couple weeks ago I noticed that the volt guage on the dash was only reading 2 notches over 8. What should it be at. I am still going to buy the fuel pump just in case. Even if it isn't bad we were plannin gon putting a bigger fuel pump in sometime in the spring
update: My stepdad and I checked on the inertia switch and it is not getting any power. We didn't have time to check the relay. How do I go about getting power to the inertia switch
From Jrichker's "Cranks okay, no start" list: Run through this list to help isolate the cause of your problem. http://www.stangnet.com/mustang-for...o-start-checklist-fuel-injected-mustangs.html Start at #3, the paragraph that begins with "clue".
Not a dumb question at all. Just use a paperclip. Looking at the diagram in the link I posted, use a paper clip to connect the green wire (fuel pump test point) to wire 46 (computer test ground). Then turn the key to the "run" position and listen for the fuel pump to prime. Let us know the results.
No luck. We tried the paper clip trick and got silence. What is the correct way to test the relay, that is the only place we haven't checked yet?
Where is the starter located. Tomorrow I am going to try to check the fusilble links. If that doesn't work I will buy a new relay
Using the diagram I posted, find the fuel pump relay. Turn ignition on and check for 12V on red wire (VPWR). If no, check for 12V on pink/black wire. If no, check fusable link. I don't know where it is on a 91-93. On 87-90, it near the starter solenoid on the driver's fender.
Update: Still can't find the problem and today when my stepdad were looking at the car we noticed that the coil looks like something burned next to it cause it has black dust all over it. Also he unplugged one of the spark plug wires from the distributor to see if it is getting any spark...nothing Could it be the coil or is that just another problem to add to the list
definitely post a pic of this cause if it's what i think it is, its the vacuum tree. if it's not hooked up or atleast capped off, you have a bad vacuum leak right there.
update After finally getting the money for a shop to look at the car, it turns out it was the pump that went out. The mechanic tried to sell me a stock oem pump for 140, I said no and went to 50resto and picked up a walbro 255lph pump for 115. All together it cost 350 to fix. Thank you all for your help and advice
I bet it dies again(since you said the car wouldnt turn over) replace the ignition if it does, just had to do mine, its easy.
