12 Sec. Gen 4 Camaro?
#41
TECH Junkie
#42
Something is cutting power for sure, follow the steps Rev mentioned above. Wouldn't hurt to check, after putting on a SLP lid I had the black seal get sucked up into the TB. Went to make a pull and the car fell on its face. Check to see if something is blocking air flow. It's a free way to diagnose an issue.
#43
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As for the tune, it's definitely not a problem with that itself as the OP has mentioned everything is stock.
no disrespect but how much car mechanics does OP know and understand if they're asking what and where the MAF is? if not much then it may be best for OP to do some reading and gaining knowledge prior to poking around on his own in and around his car. just as a precautionary measure that's all.
And I'm still not sure why folks are recommending a compression test before the basics have been checked. Makes no sense to me at all. Start with the easy and/or more likely causes first. Oops, back to the broken record again. Sorry, couldn't help myself.
#44
12 Second Club
Thread Starter
It doesnt sound like you did the compression test right...remove plugs, injector fuse, fuel pump relay, connect gauge, turn over engine a few times then look at gauge not while turning engine. It will max out and that is your reading.
Forget about suspension and all that, your engine isnt performing, and/or possibly your slushbox has issues too. I would recheck compression, new plugs and wires (cheap tr55 and GM red wires are fine), clean the MAF and throttle body, and change trans fluid
Forget about suspension and all that, your engine isnt performing, and/or possibly your slushbox has issues too. I would recheck compression, new plugs and wires (cheap tr55 and GM red wires are fine), clean the MAF and throttle body, and change trans fluid
I do hang out with an F-body group near Richmond. Most of them have sub-10 sec. cars.
The stock suspension was shot, so I wanted that fixed first. I like my car to turn and stop. You'll have to explain what a "slushbox" is.
I do have new plugs and wires. I'll work on those when I get time. I've been a little busy lately.
I'm changing the transmission, not the fluid. I plan on having a 10 sec, car eventually. Yeah, I have a long way to go.
#46
TECH Senior Member
#48
TECH Fanatic
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Going a bit further outside the box - is this a true SS? I'm wondering if this is a stock Z28 converted to an SS and has 2.73 gears in the rear instead of the 3.23. It wouldn't account for every bit of that terrible time, but non-SS gears would not generate the same time as a true factory SS.
I'd want to see a pic of the engine bay as well as a pic of the RPO codes.
I'd want to see a pic of the engine bay as well as a pic of the RPO codes.
#49
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Going a bit further outside the box - is this a true SS? I'm wondering if this is a stock Z28 converted to an SS and has 2.73 gears in the rear instead of the 3.23. It wouldn't account for every bit of that terrible time, but non-SS gears would not generate the same time as a true factory SS.
I'd want to see a pic of the engine bay as well as a pic of the RPO codes.
I'd want to see a pic of the engine bay as well as a pic of the RPO codes.
The OP is missing a ton of trap speed, he's basically in the range of an early TPI 350 3rd gen, which made 230-240hp and trapped in the ~94mph range as well. Something isn't right with the car.
#50
12 Second Club
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fresh air filter , fresh fuel filter , fresh plugs and wires-basic maintenance first.
You said you hang around with some fast f bodies , somebody you know has a scanner and a wideband and can help you get to the bottom of this before you go changing anything else don't add more possible complications.
A friend of mine had a ragtop ss that was stuck in the low 14's @103 stock and it turned out to be running fairly lean , around 14 to 1 air fuel ratio at wot with considerable KR got it in the 12.5-12.8 range and then was able to add in a bunch of timing , also halved all the torque management per the owner he didn't want to remove it all ( I do on my own stuff) bumped up shift pressures and speed/rpm thresholds conservatively car ran 13.3 @109 on street tires after. DR's would have made it a 12.90 car the mods were just the factory ss stuff lid and catback.....
You said you hang around with some fast f bodies , somebody you know has a scanner and a wideband and can help you get to the bottom of this before you go changing anything else don't add more possible complications.
A friend of mine had a ragtop ss that was stuck in the low 14's @103 stock and it turned out to be running fairly lean , around 14 to 1 air fuel ratio at wot with considerable KR got it in the 12.5-12.8 range and then was able to add in a bunch of timing , also halved all the torque management per the owner he didn't want to remove it all ( I do on my own stuff) bumped up shift pressures and speed/rpm thresholds conservatively car ran 13.3 @109 on street tires after. DR's would have made it a 12.90 car the mods were just the factory ss stuff lid and catback.....
#51
TECH Regular
As stated above multiple times there is something really wrong with your car, those times would not surprise me out of a V6, with just a dorman intake, 4000 yank ss and a tune I broke into the 12's with a street tire, the best thing you can do is take the advice members have givin you and for ***** and giggles take a pic of your engine bay and post it, I myself would like to take a look and see
#52
12 Second Club
Thread Starter
fresh air filter , fresh fuel filter , fresh plugs and wires-basic maintenance first.
You said you hang around with some fast f bodies , somebody you know has a scanner and a wideband and can help you get to the bottom of this before you go changing anything else don't add more possible complications.
You said you hang around with some fast f bodies , somebody you know has a scanner and a wideband and can help you get to the bottom of this before you go changing anything else don't add more possible complications.
I'm not sure how to post pics here. I know it's a true SS. I can still read the sticker that SLP put on the door.
I'll have to ask "Mighty Mouse" if he can check that for me. I know he has a laptop with some car-stuff software. I guess that's what you would call a scanner. I know he tunes his Vette with it.
#53
TECH Regular
#56
TECH Resident
Wondering if it's a bad air pump or a leak in the egr. Those could cause issues and aren't the most obvious things. I'd just start with full maintenance and go from there since it's probably been a while since the engine has seen a full maintenance.
#57
12 Second Club
Thread Starter
Well, it's going to EFI Performance (aka. tuned by frost) Monday. He thinks it's the MAF, but will verify. He's deleting the EGR, AIR, and rear O2 sensors. He's also replacing the plugs, wires, 4L60, exhaust manifiolds, and Y-pipe.
Edit: I just found an LS6 intake at my door. Add this to the list of swaps for "Frost". Thanks Mr. Big! (for the intake)
This should be a 12 sec. car when I get it back.
Edit: I just found an LS6 intake at my door. Add this to the list of swaps for "Frost". Thanks Mr. Big! (for the intake)
This should be a 12 sec. car when I get it back.
Last edited by Utinator; 02-17-2018 at 07:53 PM.
#58
Nice! Let us know what he they find the problem was
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Well, it's going to EFI Performance (aka. tuned by frost) Monday. He thinks it's the MAF, but will verify. He's deleting the EGR, AIR, and rear O2 sensors. He's also replacing the plugs, wires, 4L60, exhaust manifiolds, and Y-pipe.
Edit: I just found an LS6 intake at my door. Add this to the list of swaps for "Frost". Thanks Mr. Big! (for the intake)
This should be a 12 sec. car when I get it back.
Edit: I just found an LS6 intake at my door. Add this to the list of swaps for "Frost". Thanks Mr. Big! (for the intake)
This should be a 12 sec. car when I get it back.
This should definitely be sorted out before any mods or tuning are done.