I have a 1984 fiero it runs rough after I take off and once in awhile it seems to loose hp while I'm driving not all the time runs better at night. I've Changed pcv egr spark plugs and wires


Asked by thegerman72 Jun 29, 2014 at 05:41 PM about the 1984 Pontiac Fiero

Question type: Maintenance & Repair

Do u think o2 or map sensor

2 Answers


Since you have a pre-1996 you can get some diagnostics, without OBDII Check out this page: http://www.calgaryfieros.com/OSGdocs/codes.html also .. http://www.youtube.com/watch?v=lKzaCX4t7Lw

Best Answer


Your Answer

Add photo

Related Questions

  • Rough idle 6 answers

    I have a 1984 pontiac fiero and it idles quite rough and a mechanic said it may be a leak in the oil pan. I'm not sure what to do.

    1984 Pontiac Fiero


    Maintenance & Repair

  • Hard Start with High Idle 3 answers

    1984 Fiero SE Automatic. This one is driving me crazy! I has spend about $1,000 in parts and repair time at a local shop. Car always had a bit of a high idle (about 2,000 RPM), but I could live with...

    1984 Pontiac Fiero SE or Indy


    Maintenance & Repair

  • fiero wont start 5 answers

    i just picked up a se from a field, it had been there for 6 years.. i put in a new battery and the only thing im getting is accessories to power on headlights power windows.. etc.. doesnt sound like f...

    1986 Pontiac Fiero SE


    Maintenance & Repair

  • My 86 pontiac fiero se 3.4 will run fine in drive or reverse but will miss until it cuts off in nuetral or park 4 answers

    1986 Pontiac Fiero SE


    Maintenance & Repair

  • ^ cyl. pontiac grand am.. running very rough 26 answers

    My girl's car suddenly started to run like it was only firing on half the cylinders yesterday, I bought new plugs and changed them thinking she may have fouled a couple for some reason.. The old ones ...

    1999 Pontiac Grand Am 2 Dr GT Coupe


    Maintenance & Repair

Looking for a Used Fiero in your area?
CarGurus has 70 nationwide Fiero listings and the tools to find you a great deal.

Search Pontiac Fiero Questions

Pontiac Fiero Experts

Reputation 180
#1 dandyoun
Reputation 180
#3 Andrew Welsh
Andrew Welsh
Reputation 160
View All

Related Models For Sale

Used Chevrolet Camaro"
448 Great Deals out of 29,792 listings starting at $1,000
Used Ford Mustang"
690 Great Deals out of 37,655 listings starting at $1,800
Used Pontiac Firebird"
17 Great Deals out of 792 listings starting at $2,900
Used Chevrolet Corvette"
222 Great Deals out of 13,258 listings starting at $4,500
Used Honda Accord"
1,053 Great Deals out of 71,284 listings starting at $1,491
Used Toyota MR2"
18 listings
Used BMW 3 Series"
994 Great Deals out of 37,630 listings starting at $1,500
Used Dodge Challenger"
207 Great Deals out of 17,536 listings starting at $11,400
Used BMW 5 Series"
376 Great Deals out of 18,435 listings starting at $1,500