Lots of options under search for this as I don't know what's causing it. Hose leaks, EGR issues, I don't know...
RPMs sit at 3000 when cold and 1900 when idling warmed up, it felt like the RPMs went up really high when driving, and my suspicion was proven when going 70mph and at 4500RPM, when the yellow zone is at 5500RPM....
It seems to drive fine other than that though, it's been a while since I worked on my fiero but I just did a full service on it within the last couple of years, replaced spark plugs and wires, put in a new distributor and I feel like I put in a new EGR. I haven't touched any hoses yet.
Basically I don't know what I should specifically search for to help get my RPMs down...suggestions? Pictures really help with me...
Edit on the RPMs. And it is a manual 86GT 4 speed
[This message has been edited by FireGirl (edited 03-21-2016).]
Does your Fiero have an automatic transmission? If so, then the torque converter should lock at around 35mph (if you're not accelerating hard). When the torque converter locks, it will feel almost like a gear shift... the engine RPM will drop a little bit and you'll feel a slight nudge.
If your torque converter isn't locking, the engine will have higher RPM at highway speed, and fuel economy will suffer. There's a square electrical plug on the transmission for the torque converter lock-up control. If that connector comes loose, the torque converter won't be able to lock. That connector is on the front (i.e. firewall side) of the transmission, basically behind the driver's seat. It's a square plug that can hold 4 wires, but only has 2 wires in it.
Originally posted by FireGirl: RPMs sit between 1000-2000 when idling if I recall correctly, it felt like the RPMs went up really high when driving, and my suspicion was proven when going 70mph and at 3500RPM, when the yellow zone is at 4500RPM....
To go a bit further off what Blacktree said above, if the car is an automatic remember than the three speed TH125 is ultimately geared for a 55 MPH cruising speed when the US national highway speed limits were 55. Obviously driving 55 MPH on an interstate nowadays will get you ran over, and if your torque converter isn't locking up then it'll likely sound like the car is trying to kill itself at speed with high noise. The manual transmission cars tend to not pull such high RPMs even with increased cruising speed due to their gear range. If you're driving 65-70 MPH you're going to naturally be turning higher RPMs than intended. Honestly what you stated is a bit high, but you will typically see higher RPMs cruising simply due to elevated traveling speed than intended.
Confirming proper gauge operation is key also. In all four Fieros I've owned every one of them had some sort of gauge or gauges that didn't read correctly.
Also Note: Please state what year, model, engine, trans, Fiero you have to make fielding technical questions easier. Your problem could be trim level dependent.
Please state what year, model, engine, trans, Fiero you have to make fielding technical questions easier.
Yeah, asking questions regarding highway gas mileage while supplying absolutely NO information regarding engine or transmission type is a little silly to say the least.
[This message has been edited by Patrick (edited 03-15-2016).]
Yeah, asking questions regarding highway gas mileage while supplying absolutely NO information regarding engine or transmission type is a little silly to say the least.
Easy there big guy! Some of us are not wrench twisters.
lol sorry guys! It has been awhile since I've worked or even touched the fiero. Now getting back into it by myself, I apologize in advance in my lack of lingo. I did update my original post of what we're dealing with.
