alright so as the title says i bought a 91' cavalier z24 for about $950. 3.1L 3spd auto. Its got roughly 166k on it and runs drives great the only issue is that when your slowing down as you get to say 15mph it acts like the transmission is just now downshifting and as it shifts (or whatever its really doing) the rpms rise on there own which puts power to the wheels... needless to say not the best thing when your trying to stop... what could be causing that? And besides this issue, what are any other things that would cause problems in the forseeable future? the previous owner changed plugs and wires (they look pretty new) and he also mentioned replacing a sensor and replacing the ecu/pcm all within the last 2 months.
Also what would help gas mileage... cold air/exhaust/tune? Is the computer in these cars tuneable or do they have a chip that you can change the tune on or hows that work?
I posted this last night over in the second gen area but havent had any response. ive done some looking and havent had a whole lotta luck on finding cold air kits and headers for this car. can someone point me in the right direction?
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
TCC? not sure how big of a deal it was with this car... but my beretta developed the problem before...
Thats possible. I havent picked it up yet going to get it tomorrow night so maybe this week i can look at it closer. it made the rpms jump about 500-750rpm
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
Vacuum leak? I know dads 92 Z24 vert does the same thing sometimes, and it won't hold a constant idle either, and thats what it was.
hmmm i'll check all my hoses to :p
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
Valve bodys are screwed from manufacturer there are a few kits for them also
WOT Tech and MRZ performance are staples for Gen 2 tuning. WOT burns a chip and does headers (the only ones I know of made for the 2.8/3.1), and MRZ has lightened pulleys, and a few other things. The only intake systems are eBay generic kits and the Weapon R kit. Both work just fine. If you want to get into the motor, there are cam and valvetrain kits available from Summit racing. All in all, you can spend a lot of money tuning the 3.1. Alternatively, the 3400 SFI motor is a relatively easy swap and will net near the same gains for a lot less.
2010 Honda Fit LX
Tony T Crams wrote:WOT Tech and MRZ performance are staples for Gen 2 tuning. WOT burns a chip and does headers (the only ones I know of made for the 2.8/3.1), and MRZ has lightened pulleys, and a few other things. The only intake systems are eBay generic kits and the Weapon R kit. Both work just fine. If you want to get into the motor, there are cam and valvetrain kits available from Summit racing. All in all, you can spend a lot of money tuning the 3.1. Alternatively, the 3400 SFI motor is a relatively easy swap and will net near the same gains for a lot less.
Thanks for the info ill have to search those places. I'm not lookin into getting into the engine very far... mostly just lookin at bolt-ons.
Where do these engines idle at in and out of gear? seems like its idling a little high...
havent really had any more issues with slowing down as noted in op but still going to check into it
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
also.. who makes cat-back exhaust system's for these cars? not looking for loud.... just lookin to flow better.
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
well i'm not really lookin for a lotta hp im looking for gas mileage. A good tune would help gas mileage considerably even on a factory stock car so i figured it would be a good thing to do. And i have proven gas mileage gains when using a CAI on my camaro (picked up about 3 mpg highway) idk about a WAI tho. then when i put headers on the camaro it helped somewhat again. I've actually seen dyno graphs prove hp gains on when you bypass the TB so i added that in just cause its almost free lol.
I dont know im not lookin to do a lot just lookin for gas mileage in my dd
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
60degreev6.com and v6z24.com are your friends. I'm pretty sure one of them has a write up for basically every question asked, including the bypass.
If you only want better mileage, that stuff will help, but to me it's kind of expensive just for better mileage, when compared to parts for something like your Camaro. I think the payoff in fuel savings would take longer than expected in this case with what you're looking at for parts. I've tracked the mileage in my 94 Z (3.1, 5spd, the only "mod" is Camaro spec head gaskets) and I get roughly 26-27 on the highway, maybe 21-22 city. I have seen some guys getting closer to 30, but I don't know what the margin of error is.
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so you dont think it'd be worth messing with cause the gains wouldn't be big enough?
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
You would see better gas mileage and bang for your buck switching to a 5 speed or 3400/3500. If you search junkyards and online you can do both swaps for under $300 I got my complete 3400 long block for $80 and my 5 speed tranny with axles for $50 from a local yard, Pacients is the key.
On the inside my car looks like a fighter jet.
yea i have been thinking about a 5 spd swap (been thinkin about a lot on this car lol) ... whats 5spd trannies will bolt up to the 3.1 not interested in swapping engines yet. if i ever do id swap a supercharged 3.8L
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
Yeah, I don't think the "car paid for itself in gas" would occur anytime soon for you if you did the mods you listed.
The bellhousing bolt pattern is the same for the 2.0OHV, 2.2LN2, 2200, 2.8, 3.1, and 3x00. The only "real" 5 spd option you have is the MG2 Getrag/Muncie (87-91) or NVG T550 (92-94). It only came behind the 2.8 and 3.1. The Isuzu MK7 came stock behind the 2.2LN2, and a few people have used it behind a 3.1, but reliability was an issue. You could also use a 3rd gen transmission, but you would need custom mounts.
There was actually at least one guy who did an L67 swap into a 2nd gen. I don't remember how it turned out, but IIRC, it only needed one custom mount.
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ok thanks for the info James, is there any good complete write-ups on the 3spd - 5spd swap?
I'll need:
manual computer/manual tune
transmission
clutch petal
clutch
manual center consol
shifter/cables
anything else? any good places to get a decent transmission?
maybe i can start on this within the next month or two if money allows
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
http://www.v6z24.com/howto/trannyswap
The "parts necessary" section should only be the highlighted-
Quote:
Parts Necessary:
Getrag-Muncie 5 speed, shift cables, cable-mounting hardware (inc. firewall plate and gasket), manual shifter, shifter boot ring and knob, manual-transaxle center console upper piece and braces, manual transaxle driver�s side lower and center dash, manual transaxle ignition module (on steering column), manual transaxle engine wiring harness and computer, flywheel, clutch, manual transaxle brake pedal and clutch pedal, clutch slave and master cylinders and hardware, passenger side chassis support, manual transmission radiator, and manual transmission half-shafts.
The other stuff listed is not needed, the How-To just never got updated. For the computer, you don't actually need the whole computer, just the manual PROM. The wiring harness can easily be modified at the PRNDL switch, IIRC you need to jump the yellow to the purple wire. The actual center console is the same, it's just the cover plate that's different. The subframe is actually different, but the manual one only has the addition of a little tab for the snubber on the manual trans to bump (which never happens). The only difference in radiator is the addition of a trans cooler on the auto one. The ignition switch is actually different, the manual one has the button to push and turn the key to off, but it's possible and just fine to use the auto switch. Keep in mind- make sure you get ALL the clutch related stuff for whichever trans you use from a car of the same year the trans is out of (or at least the same type of clutch- int vs ext). You will also need a trans with the electronic VSS, since you have a 94.
When you're over on V6Z24, do some searching around to see the different people that have done it. There are tons of pictures and more info. It's a pretty straightforward swap, just making sure you have the right parts is the difficult part.
IMO- I would try to score a set of factory half shafts and a Beretta style intermediate shaft off www.car-part.com. People always run into problems with aftermarket remaned axles.
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thanks for the write up and the list... as soon as i get the camaro running reliably ill get started collecting parts
94' Camaro z28 a4= bolt-ons and cam
91' Cavalier z24 a3= stock DD
