i have a newly rebuilt 351w bored 40 over 500 lift comp cam fires up run great when on gas at idle she stoles or rpm are going up and down

20

Asked by Jan 11, 2016 at 08:22 AM about the 1984 Ford Mustang GT Hatchback

Question type: General

ford 351w,          stock heads new valve spring for the cam, ported, valve seat were opened up , rpm intake, holly 600  4 barrel carb, roller rocker arms, 6 to 8 psi 80 gph fuel pump, stander tranny what could be the problem

2 Answers

43,785

Is there a vacuum advance on there? Are you using the old ECM or bypass it all?

43,785

New carburetor?

Your Answer

Add photo

Related Questions

  • 64.5 mustang with 260V8? 43 answers

    I have a 64.5, and it has the Original 260 V8. I pulled the heads off, to replace it with some 351W 1969 DO0E Heads,the top of the pistons are stamped 0.40. It was rebuilt 3K miles ago, from the first...

    1964 Ford Mustang Standard Coupe

    -

    General

  • Gas mileage 11 answers

    I have a 1984 mustang lx convertible and I'm getting about 80-90 miles on a 14 gallon tank. Now that's shitty. It is a 3.8 v6 automatic. I really REALLY want to get rid of the car because of it. When...

    1984 Ford Mustang LX

    -

    General

  • How many 1964 1/2 Mustangs were made? 101 answers

    I would like to know how many 1964 1/2 Mustangs were made and how many of them were convertibles.

    1964 Ford Mustang

    -

    General

  • Fastest 1/4 mile time?! 16 answers

    I just want to know what is the fastest someone has ran with a 1997 GT mustang that is stock. I have put on a custom exhaust system and I ran 14.6

    1997 Ford Mustang GT Coupe

    -

    General

  • Idle 4 answers

    Stock 02 mustang gt great car had it for a long time .. but now if it sets for 12 or more hours when it's time to go for a ride she has a high idle 1500 RPM drive it to my stop sine everyday and c...

    2002 Ford Mustang GT Convertible

    -

    Maintenance & Repair

Search Ford Mustang Questions

UK Questions

Are you a UK consumer? CarGurus now has a discussion forum in the UK.

Ford Mustang Experts

#1 Tom Demyan
Tom Demyan
Reputation 3,990
#2 FordNut
FordNut
Reputation 1,230
#3 COMETGUY61
COMETGUY61
Reputation 990
View All

Related Models For Sale

Used Chevrolet Camaro
400 Great Deals out of 40,630 listings starting at $3,500
Used Dodge Challenger
334 Great Deals out of 25,059 listings starting at $7,988
Used Dodge Charger
466 Great Deals out of 30,107 listings starting at $2,275
Used Chevrolet Corvette
284 Great Deals out of 20,515 listings starting at $3,688
Used Ford F-150
3,014 Great Deals out of 207,752 listings starting at $1,000
Used BMW 3 Series
1,512 Great Deals out of 38,828 listings starting at $1,498
Used Honda Accord
995 Great Deals out of 75,205 listings starting at $899

Used Cars For Sale

2017 Ford Mustang For Sale
6 Great Deals out of 19,999 listings starting at $19,775
2016 Ford Mustang For Sale
59 Great Deals out of 3,624 listings starting at $16,999
2015 Ford Mustang For Sale
79 Great Deals out of 3,272 listings starting at $14,999
2014 Ford Mustang For Sale
67 Great Deals out of 2,792 listings starting at $9,500
2013 Ford Mustang For Sale
27 Great Deals out of 1,353 listings starting at $9,995