1993 Ford Aerostar Misfire

1993 FORD AEROSTAR
209,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
IBMTECH
  • MEMBER
  • 3 POSTS
My 93 Aerostar will run fine when cold once it has warmed up it will skip on 1 cyl when you restart it. If you let cool it will start and run fine. The engine does not use oil, no smoke, no odd noises from the engine. I have done a complete tune up (wires, plugs, cap, rotor, ect) I have no check engine lights, no codes what so ever. I done a compression check all cyl have 140-145.
I'm leaning towards a fuel injector shutting down what do you think?
Nov 10, 2008 at 12:43 PM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
It could be a fuel inj. problem. Because there are no codes, we don't know what cylender is missing. I'm leaning to a weak coil.

Joe
Nov 27, 2008 at 2:54 PM
Avatar
IBMTECH
  • MEMBER
  • 3 POSTS
[quote:92cb9ea167="Jacobandnickolas"]It could be a fuel inj. problem. Because there are no codes, we don't know what cylender is missing. I'm leaning to a weak coil.

Joe[/quote:92cb9ea167]

It skips on 2 cylinders 1 & 2 both on the right side. The coil has been replaced along with the Dist and module. I can get both cylinders firing on the highway with a steady throttle. I have checked the cam with a dial indicator and its well within spec's. I just ran injector cleaner and that helped. So I'm going to replace the injectors and hope for the best unless someone can enlighten me to another possible cause..
Nov 28, 2008 at 4:52 AM
Avatar
JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Hi:
If the compression is good and ignition is firing properly, that is the last choice. Let me know what you find.

Joe
Nov 28, 2008 at 6:53 AM
Avatar
IBMTECH
  • MEMBER
  • 3 POSTS
[quote:d9b3feca15="Jacobandnickolas"]Hi:
If the compression is good and ignition is firing properly, that is the last choice. Let me know what you find.

Joe[/quote:d9b3feca15]

Hi, I installed the new injectors and it runs great now looking at the injectors from the right bank two were caked with carbon like deposits one the tip was damaged I don't know how this happen it's the first time they have been removed. Thank you for your time!
Nov 29, 2008 at 7:32 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle