Any one have experience with 2.5L’s?
Printed From: West Coast Fieros
Category: Technical Topics Forum
Forum Name: Technical Questions and Discussions
Forum Description: Got a technical question about your fiero? ask it here.
URL: http://www.westcoastfieros.com/forum/forum_posts.asp?TID=1381
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Topic: Any one have experience with 2.5L’s?
Posted By: Matt
Subject: Any one have experience with 2.5L’s?
Date Posted: 15 June 2009 at 9:56pm
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So after a nightmare-ish job of sorting through the ghosts in the ignition system the car started running, but the base timing would jump around 2-5 degrees at an idle. Which I read can be caused by a worn gear, so I figured, "Screw it, I'll get just a whole new distributor." Well today I pulled out the old dist, marking things and making sure everything lined up, etc etc. Now the stupid thing won't even start. I figured perhaps I meshed the wrong gear placement, so I'll just start from scratch. This is what my book told me to do... 1. Remove the number one spark plug (**which is the one closest to driver side**) 2. Place finger over spark plug hole while turning the crankshaft with a wrench on the pulley bolt at the front of the engine. 3. When you feel compression, continue turning the crankshaft slowly until the timing mark on the crankshaft pulley is aligned with the 0 on the engine timing indicator. 4. Position the rotor to point between the number one and number three distributor terminals **which I believe is 12 o'clock** 5. Insert the distributor into the engine, making sure the gears mesh, etc, etc. 6. Install the hold-down clamp and tighten the bolt to the specified torque. 7. Install distributor cap and coil wire 8. Start car! Well I did all this and the car is firing, and back-firing, but not running. I'm wondering if anyone has any other instructions or advice to help get my Fiero on the road for the summer! ------------- I wanna go fast. |
Replies:
Posted By: Matt
Date Posted: 15 June 2009 at 10:34pm
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If the module plugs are pointing upward, the terminals will make a "X" formation (otherwise they'd be slanted) with the lead wire in the middle. Is the no.1 terminal in the top left? Another way to look at it would be.. Where would the module plugs be in this picture.  ------------- I wanna go fast. |
Posted By: Patrick
Date Posted: 15 June 2009 at 10:42pm
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You've also got to determine whether or not the outer ring of your harmonic damper has spun on the inner hub. If it has (it happened to my GT's 2.8), then the timing marks mean nothing!
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Posted By: Matt
Date Posted: 15 June 2009 at 11:14pm
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Ok let's just go with, it hasn't spun the inner hub. Is this right? It fires clockwise.  ------------- I wanna go fast. |
Posted By: marcelvdgn
Date Posted: 15 June 2009 at 11:16pm
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Matt i always thought the front of the engine was the number one cylinder on an inline motor and your drawing also indicates this. if you pull the spark plug from the driverside of the car, you pulled number four , not nbr one. try the compression finger test again on the front cylinder (passenger side) ------------- Marcel 86SE V6 Auto 85SE V6 Auto 85 2m4 soon to be sleeper 3.8sc 5 speed |
Posted By: Matt
Date Posted: 15 June 2009 at 11:44pm
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Hanes says that the no.1 cylinder is the one closest to the transaxel... aka the driver side. There is compression on the cylinder furthest from the transaxel abit before the timing notch in the crank pulley. And compression in the cylinder closest to right before the notch. But I'll check again tomorrow. ------------- I wanna go fast. |
Posted By: Capt Fiero
Date Posted: 16 June 2009 at 12:02am
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Maybe this will help.
------------- Capt Fiero 88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
Posted By: Matt
Date Posted: 16 June 2009 at 12:10am
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That's perfect! Thanks Capt'n. I just insured the car today after a very long time. My wife is expecting our first in 2 months so this will be my last chance to drive the Fiero until she can go back to work so that we can afford 2 vehicles. Hopefully I can getting running now. Thanks again. ------------- I wanna go fast. |
Posted By: Patrick
Date Posted: 16 June 2009 at 12:21am
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So, was the manual wrong?
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Matt wrote:Posted By: Matt
Date Posted: 16 June 2009 at 1:00am
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According to Capt'ns diagram in the bottom left corner. Hanes was right. *Assuming that seemingly cylindrical object on the right of the engine is the crank pulley. ------------- I wanna go fast. |
Posted By: Patrick
Date Posted: 16 June 2009 at 1:04am
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Okay, now I'm confused. Doesn't that diagram show #1 cylinder to be closest to the water pump end (passenger side) of the engine? How is that closest to the transaxel (driver's side)?
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Posted By: Matt
Date Posted: 16 June 2009 at 1:12am
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LOL you're right! Yeah I'm confused as well. OH OH!!! WAIT.. got it! Re-checked Hanes Manual... (here's what it says) Specifications: Cylinder number (right-to-left - transaxel is on the left) 4-cylinder engine ................................... 1-2-3-4 Very backwards way of saying it, but Capt'ns diagram coincides with Hanes. Sorry for the confusion, hopefully I'll get the car running tomorrow! ------------- I wanna go fast. |
Posted By: Patrick
Date Posted: 16 June 2009 at 1:17am
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Fixed that for you.
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Posted By: Matt
Date Posted: 16 June 2009 at 9:42pm
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Threw it back together after work today, positioning the dist in the proper place, and she fired right up. Just have to fine tune it now, as it still doesn't really like to run at 8 degrees though At 8 the bottom end is smooth as butter but the mid looses power and the car is "lurchy" At 10, mid is good, but bottom and top ends suffer At 12 bottom is difficult to get the car started without liberally applying throttle, mid's are alright and she pulls REALLY strong in the top end. Bottom end= 0-2000 rpm Mid= 2000-3200 rpm Top end = 3200-4000 rpm ------------- I wanna go fast. |