No Power below 2k RPM

JohnBoySS
25

Asked by JohnBoySS Oct 23, 2012 at 10:01 AM about the 1988 Pontiac Fiero Base

Question type: Maintenance & Repair

My 88 Fiero 4 cylinder doesn't seem to have much power till 2000 rpm +-. If you rev it a bit and let up, it drops rpms so low that it almost goes dead and sometimes does. When it doesn't go dead it recovers with eratic rpm, up to 2k, down to 500. Does the up an down 2/3 times then levels at 1k. Whe you press the accelerator it's kinda hesitant/doggie. Kinda like a bad carb.
Any thoughts? Idle Air Control maybe????

3 Answers

pittsburgh2
20

IAC or EGR both will cause this problem

Andrew Welsh
195

Low power until 2000 rpm isn't that abnormal... unless its really low. I have the same thing on my '87 4 cylinder. The engine makes peak torque around 2300rpm, so that's about when you start to feel the power. IAC is the most likely source of the irregular idle issue. EGR doesn't have much of an effect on how this engine runs really. I've had mine blocked and unblocked and bolts loose and it pretty much always ran the same.

Jason Zane
3,135

also have you changed the fuel filter?

Your Answer

Related Questions

  • Start/Idle 4 answers

    88 Fiero 4cyl. Sometimes it acts like maybe it is flooded. Wont start. Wait about an hour and it starts but idle bounces between 500-1500 rpm for a minute then smooths out. Has a new IAC and fuel ...

    1988 Pontiac Fiero Base

    -

    Maintenance & Repair

  • Surgering idle and dies at stop sign 1 answer

    My Fiero Gt with manual transmission, 110,000miles has a surgeing idle of a few hundred RPM, at stopping it often dies.....O2 sensor new, TPS sensor new, EGR tube new, cannot find no vacumn leaks...an...

    1985 Pontiac Fiero GT

    -

    Maintenance & Repair

  • Hard start and a bit lean 2 answers

    Just got an 88 Fiero. Most of the time it runs great. BUT! Sometimes it will start, run for a second or 2 then quit. Does that several times running longer each time the eventually keeps running. At f...

    1988 Pontiac Fiero Base

    -

    Maintenance & Repair

  • Hard Start with High Idle 2 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

  • Engine power loss and sputtering 25 answers

    It seems like I have a loss of power when accelerating and driving around 50-60 mph at ~2k rpm. The car also sputters and rpm begins to fluctuate while driving. Is the fuel injector bad or clogged and...

    1995 Pontiac Grand Prix 2 Dr SE Coupe

    -

    Maintenance & Repair

Fiero
Looking for a Used Fiero in your area?
CarGurus has 67 nationwide Fiero listings starting at $2,500.
ZIP:

Search Pontiac Fiero Questions

Pontiac Fiero Experts

#1 Andrew Welsh
Andrew Welsh
Reputation 140
#1 dandyoun
dandyoun
Reputation 140
#3 Racer_X
Racer_X
Reputation 110
View All