1985 gt convertible ruff idle & slow throttle response
- Thread starter Myfirstgt
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well basically there is not much you can do to a CFI system that I know of, to get the stuff you got running better you need to first check fuel pressure, see if anyone's fussed with the timing and check what happens to the spark when trying to rev it above 2500 rpms with a spark tester. Pull a plug and see what brand it is and condition of the sparking end, remember these engines don't need any e3 triple gold plated sparklers, just plain old copper autolite -em-ups.
85GTStangGuy
Advanced Member
I know for a fact the manual 85's (which came with the Holley 4180C) did, so I'd assume the same is true with the automatics, since they both had to meet the emissions standards in effect at that time.
I think that diagram may be for the carb'ed motor, not the CFI motor.
Nobody hi-jacked your thread. Every post so far has been on-topic.
Now, I know how, don't get me wrong.
I think you need to start from the beginning. Since we know it’s a ECU driven engine, you need to pull the codes, test the vacuum, compression test, timing, etc. Gather all that and plan your attack. Now, for known problems with this throttle body injector system, the two injectors can get clogged, low fuel pressure fits your symptoms, as well as late timing. But vacuum is still the likely problem. Since the car likely has old vacuum lines, I would just replace them all. My last mid 1980’s Ford CFE problem turned out to be a clogged injector. I can’t remember if I was able to replace the two injectors or I had to buy a rebuilt throttle body. Just my 2 cents.
So if you reread what Noobz was saying he was merely asking if anyone knew what it would take to swap to a carb setup to get you another path. I happen to agree with him as my 83 T-Brid was CFI and it was a pile of crap. Switched it to a carb when it got the warmed up 306 and T5 and never looked back.
stangnet.com
Lots of threads on the Mustang sites about swapping. The CFI cars have an intank lift pump and then an external high pressure pump on the rear frame rail. From what I remember you can simply remove the high pressure pump and the lift pump will provide enough pressure and volume for a carbureted car. You will need a fuel pressure regulator. The only reason I know this is a guy over on a Thunderbird forum did this with a mild 351W and it ran fine.
CFI to Carb swap help! Please god!
Okay. I have a 1985 Mustang GT convertible with an AOD tranny. I can't stand it! I want to go carb so bad but can't find a good, COMPLETE parts list or how to. I've seen tons of little tid bits here and there and peoples GUESSES but I want someone who KNOWS what they're talking about. I know I...
stangnet.com
Lots of threads on the Mustang sites about swapping. The CFI cars have an intank lift pump and then an external high pressure pump on the rear frame rail. From what I remember you can simply remove the high pressure pump and the lift pump will provide enough pressure and volume for a carbureted car. You will need a fuel pressure regulator. The only reason I know this is a guy over on a Thunderbird forum did this with a mild 351W and it ran fine.
So if you reread what Noobz was saying he was merely asking if anyone knew what it would take to swap to a carb setup to get you another path. I happen to agree with him as my 83 T-Brid was CFI and it was a pile of crap. Switched it to a carb when it got the warmed up 306 and T5 and never looked back.
CFI to Carb swap help! Please god!
Okay. I have a 1985 Mustang GT convertible with an AOD tranny. I can't stand it! I want to go carb so bad but can't find a good, COMPLETE parts list or how to. I've seen tons of little tid bits here and there and peoples GUESSES but I want someone who KNOWS what they're talking about. I know I...
Lots of threads on the Mustang sites about swapping. The CFI cars have an intank lift pump and then an external high pressure pump on the rear frame rail. From what I remember you can simply remove the high pressure pump and the lift pump will provide enough pressure and volume for a carbureted car. You will need a fuel pressure regulator. The only reason I know this is a guy over on a Thunderbird forum did this with a mild 351W and it ran fine.
Attachments
So if you reread what Noobz was saying he was merely asking if anyone knew what it would take to swap to a carb setup to get you another path. I happen to agree with him as my 83 T-Brid was CFI and it was a pile of crap. Switched it to a carb when it got the warmed up 306 and T5 and never looked back.
CFI to Carb swap help! Please god!
Okay. I have a 1985 Mustang GT convertible with an AOD tranny. I can't stand it! I want to go carb so bad but can't find a good, COMPLETE parts list or how to. I've seen tons of little tid bits here and there and peoples GUESSES but I want someone who KNOWS what they're talking about. I know I...
Lots of threads on the Mustang sites about swapping. The CFI cars have an intank lift pump and then an external high pressure pump on the rear frame rail. From what I remember you can simply remove the high pressure pump and the lift pump will provide enough pressure and volume for a carbureted car. You will need a fuel pressure regulator. The only reason I know this is a guy over on a Thunderbird forum did this with a mild 351W and it ran fine.
Attachments
I really thought he was concerned about the rough idle and I gave some advice on how to fix it ISo if you reread what Noobz was saying he was merely asking if anyone knew what it would take to swap to a carb setup to get you another path. I happen to agree with him as my 83 T-Brid was CFI and it was a pile of crap. Switched it to a carb when it got the warmed up 306 and T5 and never looked back.
CFI to Carb swap help! Please god!
Okay. I have a 1985 Mustang GT convertible with an AOD tranny. I can't stand it! I want to go carb so bad but can't find a good, COMPLETE parts list or how to. I've seen tons of little tid bits here and there and peoples GUESSES but I want someone who KNOWS what they're talking about. I know I...
Lots of threads on the Mustang sites about swapping. The CFI cars have an intank lift pump and then an external high pressure pump on the rear frame rail. From what I remember you can simply remove the high pressure pump and the lift pump will provide enough pressure and volume for a carbureted car. You will need a fuel pressure regulator. The only reason I know this is a guy over on a Thunderbird forum did this with a mild 351W and it ran fine.
don't think he always had to be replacing parts
Unfortunately I have not had time to do that. Gotta work and be a responsible senior adult first. lol Sorta funny cause when I took the pics this morning the girl says… maybe you should have sent pictures under the hood!! I just looked at her and took another drink of my coffee. she’s smarter than she looks. I’ll take some when I get back to the house.
85GTStangGuy
Advanced Member
he's a member of 'The Women Bashers Club'Similar threads
