PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Tuning or fuel issues?

Old Aug 23, 2007 | 08:57 PM
  #1  
lastcall190's Avatar
Thread Starter
TECH Addict
iTrader: (36)
 
Joined: May 2004
Posts: 2,656
Likes: 4
From: NJ
Default Tuning or fuel issues?

Here goes. A while back, over 3k miles, I did the cam install. Putted around untuned for a week, drove real conservatively, then got the car tuned. Put down 375hp/361tq at 12.4:1 a/f. Drove the car home, ran AWESOME. Ran top notch for weeks. Recently, however, an issue has come up that is confusing me. I can start the car up after sitting all night, cold start, and it starts perfect, warms up, then falls into idle after a few minutes (I let it go ~5-7 minutes before work, just because I have spare time). So I come back from work after it sat all day (around 8 hours and started great, fell into idle, etc.). So I park the car in my garage, and go out about an hour later. I start it up, barely idles, I have to almost keep it alive similar to how when you FIRST install the cam it is. So when I finally get it out onto the road, it's bucking and surging getting out of my development. When I lean into it and give it more than 1/2 throttle it smooths out. After ~10 minutes of driving, it levels out and is ok. A few days driving home from work on the highway in traffic as I would accellerate gradually then come up on traffic and slow down to stop, it almost died. And tonight after dinner I started it, same ****. Rough start, rough idle, almost died as I turned the wheel to back out of the space. Went to my friend's house, left about 30 minutes later, car started up with the same story, and as I was giving it some gas, revs came up, down, and it died. Had to wait a few minutes, tried again, same ****, and nearly died again. Is this tuning related or what? If it was a fuel issue I would assume it would be BETTER the shorter it sat. Right after I got the car back it was running awesome. Now it's running like crap unless I let it warm up for quite some time in most cases. The cam is not that big either (224/226 on 111LSA). Any ideas? Thanks.

-J
Reply
Old Aug 25, 2007 | 09:38 AM
  #2  
lastcall190's Avatar
Thread Starter
TECH Addict
iTrader: (36)
 
Joined: May 2004
Posts: 2,656
Likes: 4
From: NJ
Default

...maybe it's neither. Just went out to change the EGR tube gasket and figured what the hell lemme just recheck some intake bolts. The back three were so loose the threads were showing. So I guess an intake leak wouldn't have anything to do with my car's issues

-J
Reply


Thread Tools
Search this Thread

All times are GMT -5. The time now is 02:00 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


VIEW MORE
story-3
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-4
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-5
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-6
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-7
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-8
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-9
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE