99 ford mustang 3.8l

Asked by Mar 12, 2017 at 09:09 PM about the 1999 Ford Mustang

Question type: Maintenance & Repair

I have a 99 ford mustang 3.8l I bought not long
ago, then man i bought it from said it had been
sitting up for 5 months, I have changed the plugs,
wires, fuel filter, air filter, oil, crankshaft sensor,
camshaft sensor, dropped the gas tank and
drained old gas out, brand new battery, checked
and replaced all fuses, the car will crank but will
not start unless I pump the gas, if I hold the gas
down it back fires and won't start but I can pump it
and will start, once its running it idles good but
when I put it in reverse it trys to die then I put it in N
and the RPMs shoot up to 2500, put it in drive and
it hesitates a minute then shifts in a will spin the
tires without me pressing the gas but then trys to
die unless im giving it gas any ideas on what could
be causing my problem? Also check engine light
isn't on so it isn't throwing any codes, any advice is
much appreciated

3 Answers

355

Check the mas air sensor

Best Answer
1,105

get it to idle first ,you have little idea of this cars history , what did the plugs look like ? when you crank it over it should fire and run if it has gas and spark ,back firing isn't good , if thats what it does find the problem , How are codes pulled , do you have the obd port ? scan for codes even if the light ain't on . let us know what happens

The plugs were filed down, codes are pulled from OBD port with my OBD2 code reader and doesn't read any codes because the check engine light isn't on which means what ever the problem is isn't throwing a code Ill check the MAF sensor tomorrow

Your Answer

Add photo

Related Questions

  • I have a 99 mustang and i need to know engine compatibility 2 answers

    My 99 mustang is about to throw a rod or I think maybe the head might be warped. I would like to go for a full drop in swap, Its a 3.8L v6 the car is still running but I just have it parked. I just n...

    1999 Ford Mustang STD Coupe

    -

    Maintenance & Repair

  • 99 mustang 3.8L v6 1 answer

    I have a 99 ford mustang I not long purchased , I have changed plugs, wires, fuel filter, air filter, changed the oil, new state, new terminals and a few others, once it starts it runs like a top ...

    1999 Ford Mustang

    -

    Maintenance & Repair

  • Can I use an exhaust system from a 3.8L mustang for my 3.9L mustang? 1 answer

    2004 Ford Mustang Base Convertible

    -

    Maintenance & Repair

  • 1986 mustang lx 3.8l 4 answers

    Guys, This is the second question i have asked concerning the white smoke under load on this vehicle.I appreciate the previous answers but I tried all the tests that where offered and none proved to ...

    1986 Ford Mustang LX Convertible

    -

    Maintenance & Repair

  • 99 mustang? 8 answers

    I found a 99 mustang 35th edition. Its color is white and the person don't know much about it she is not the cat type I guess. anyways she says it has a v8 and also has a 6 speed manual tranny. I cant...

    1999 Ford Mustang

    -

    Shopping & Pricing

Mustang

Looking for a Used Mustang in your area?

CarGurus has 1,334 nationwide Mustang listings starting at $5,980.

Postal Code:

Search Ford Mustang Questions

Ford Mustang Experts

#1 Tom Demyan
Tom Demyan
Reputation 4,290
#2 Bob Beaman
Bob Beaman
Reputation 1,210
#3 COMETGUY61
COMETGUY61
Reputation 1,060
View All

Related Models For Sale

Used Chevrolet Camaro
984 listings starting at $13,999
Used Chevrolet Corvette
661 listings starting at $11,995
Used Ford F-150
296 Great Deals out of 8,122 listings starting at $2,499
Used BMW 3 Series
137 Great Deals out of 2,009 listings starting at $3,900
Used Jeep Wrangler
98 Great Deals out of 1,439 listings starting at $5,995
Used Chevrolet Silverado 1500
102 Great Deals out of 6,035 listings starting at $2,339
Used Honda Civic
345 Great Deals out of 4,847 listings starting at $1,750
Used BMW M3
90 listings starting at $14,995

Used Cars For Sale

2017 Ford Mustang For Sale
546 listings starting at $24,248
2016 Ford Mustang For Sale
192 listings starting at $24,995
2015 Ford Mustang For Sale
97 listings starting at $23,295
2014 Ford Mustang For Sale
162 listings starting at $16,900

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.