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Average RPMs for my 4cyl? by Techbot
Started on: 02-20-2008 02:16 AM
Replies: 6
Last post by: 2farnorth on 02-20-2008 04:42 PM
Techbot
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Report this Post02-20-2008 02:16 AM Click Here to See the Profile for TechbotSend a Private Message to TechbotDirect Link to This Post
I just picked this Fiero up today after not owning one of the little guys for a few years now. I was driving it home and it just seemed like the rpms were too high for the speed I was traveling at. I was going about 45-50mph with rpms around 2500-3000.

I DO plan on doing a full tune up this coming week so hopefully that'll take care of some issues like that
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2farnorth
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Report this Post02-20-2008 03:25 AM Click Here to See the Profile for 2farnorthSend a Private Message to 2farnorthDirect Link to This Post
Must be an automatic. Mine does 3000 at about 67mph. 55 mph is near 2500 (providing that the TCC is working properly). Stick shift ones do a little better
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Curlrup
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Report this Post02-20-2008 08:32 AM Click Here to See the Profile for CurlrupClick Here to visit Curlrup's HomePageSend a Private Message to CurlrupDirect Link to This Post
 
quote
Originally posted by 2farnorth:

Must be an automatic. Mine does 3000 at about 67mph. 55 mph is near 2500 (providing that the TCC is working properly). Stick shift ones do a little better


ditto, on my 3 speed tranny.
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Blacktree
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Report this Post02-20-2008 09:21 AM Click Here to See the Profile for BlacktreeClick Here to visit Blacktree's HomePageClick Here to Email BlacktreeSend a Private Message to BlacktreeDirect Link to This Post
 
quote
Originally posted by Techbot: I was going about 45-50mph with rpms around 2500-3000.

That does seem a bit high. Assuming it has an automatic transmission, I'd check to see if the torque converter is locking.
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Techbot
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Report this Post02-20-2008 11:00 AM Click Here to See the Profile for TechbotSend a Private Message to TechbotDirect Link to This Post
i did notice that it didn't downshift sometimes. i had to manually put it into 2nd (yes, its an automatic, sorry i didn't mention that) and once it got up to speed, i'd put it back in drive and it was ok
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josef644
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Report this Post02-20-2008 11:49 AM Click Here to See the Profile for josef644Click Here to Email josef644Send a Private Message to josef644Direct Link to This Post
55MPH is 1500 rpm on my 86 2.5 with a 5 spd. 37 mpg right now, hopeing for better as the new rings seat in.
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2farnorth
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Report this Post02-20-2008 04:42 PM Click Here to See the Profile for 2farnorthSend a Private Message to 2farnorthDirect Link to This Post
 
quote
Originally posted by Techbot:

i did notice that it didn't downshift sometimes. i had to manually put it into 2nd (yes, its an automatic, sorry i didn't mention that) and once it got up to speed, i'd put it back in drive and it was ok


Check the adjustment on the TV cable that runs from the throttle body to the top of the trans. If it's not adjusted right the trans will not up shift or down shift properly.

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