I have had this problem since I bought the car 4 years ago, but never this bad.

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The most obvious things to check are the fuel pump and  injectors, the fuel pressure regulator, vacuum leaks.  And the next is the fuel return line.  I have seen cars with that return line plugged, and it makes for all sorts of annoying problems.  Another possibility is the Throttle Position Sensor. 

Some more obscure ideas:  a leak where the two halves of the unit mate, or worn throttle shafts, coolant temp sensor,.

Corvette Fever mag had an article about tuning the Crossfire.  I found it online at: http://www.corvettefever.com/techarticles/4688_chevrolet_corvette_efi_system_tuning/index.html


Good luck

Larry

When all tune up items are okay and there is no vacuum leaks the throttle bodies are out of adjustment.  Don't forget the PCV valve, use an AC delco valve, NOT and aftermarket.  These are very touchy.

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Dave, you have a PM

Dave, do you have the '82 service manual? It has pretty good instructions with lots of pictures on the Injection system.

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Lifetime Member #116
Dave's '82

   

When my X-Fire refused to idle, the fix was to reseat the prom in the computer seat.  Maybe I had a bad contact at a pin.  I haven't had a single episode of poor idle or cease-fire ever since I did that, two years ago.

To balance the throttle bodies, you won't need to reinstall the original chips.   I don't have a picture, but if you take one and post it, I will grab it, apply the proper arrows, and repost with the information.

With all the sensors being up to spec and running as they should, make sure the front trottle body isn't resting on the idle stop before the rear throttle body does. They should both be resting on the respective stops at the same time. The main reason being important is that the front throttle plate will be closed and the rear will be slightly open. Then the idle control motor can't react fast enough to adjust air, hence the up and down rpm until it stalls. My CF did this and I found the long linkage rod from the front TB causes the bracket connecting it to the rear TB to bend. Try holding the rear TB still at idle and put forward pressure on the front linkage rod and see if it doesn't smooth out! If it does, take a pair of pliers to the bracket holding both linkage rods (looks like a "C" shape) and slightly bend it forward. Over the years of motion, the front rod puts so much pressure on the bracket causing it to bend. TB's won't be out of sink unless modified or removed. In that case, they have to be timed together. 

The question was asked somewhere above about how to find a vacuum leak.  Another of my "Old Guy" easy tricks is to let the engine idle, and spray suspect areas with starter fluid or Gumout spray.  If you hit a leak, the engine will rev for a second.

Larry

That old guy tip can also use carb cleaner, or propane with a hose on the bottle.

Hi Dave, just received Corvette Enthusiast. Chris Petris has a article on Cross-Fire injection that might help. He also has a web site, www.corvetteclinicinc.com. Hope this helps! Dick

I just got back from North Conway, NH. Great trip and the car ran OK. Still has the idle problem, but not as bad as last weekend.

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Dave, bring the gaskets on the next trip though Cuyahoga Falls.  Let me know so we can schedule around my jobs.   It will be a happy camper when you leave.

Ken,

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Good article in the current issue of Corvette Enthusiast Magazine regarding the Crossfire.  Tells you where to look for common problems and how to fix them.

Can't find Corvette Enthusiast magazine at any of my local bookstores.  I'd love to have a copy of the crossfire troubleshooting article that VetteCountry is speaking of.  If anyone could xerox,  I'd certainly be glad to cover any expenses.

Dave i have same problem with mine. Its back to the shop tomorrow . If they find out what it is .I'll make Huss691981 post it .

[QUOTE=Crossfire1982]...Can't find Corvette Enthusiast magazine at any of my local bookstores...[/QUOTE]

pm sent

Dave I told you as soon as I got my car running right I'd let you know what they did.  We went through all the  things above .What it turned out  to be was adjusting idle  - tect drive and accel ignition module .I've driven it for two weeks  and it seems to have fixed  it.

Hey guys,

You guys keep making me happy about getting rid of my Cross-Fire. But I do feel bad for you guys, beleave me I know what your going thru.

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Lifetime Member #116
Dave's '82

   

This may be the final post on this chapter.

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Did ya change the fuel filter at the same time? If not, ya might wanna do that...
Glas ya did something that made it better, anyway...
Adams' Apple2009-09-24 09:50:53

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Not yet. I bought one the same day, but wanted to do it one step at a time.

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I knew I shuda knocked on wood. My problem is back.

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You MAY have either a fuse-link by the starter that is failing, or a loose connection at the starter...that could cause ALL of the symptoms....
I had a similar problem a few years ago on my 'Burban. It actually stranded us in Arkansas once. Eventually(a few months later...I'm lazy...), I found the problem was a fuse link by the starter. It looked OK, but tugging on the wire showed it would stretch...not a good thing! I simply cut the link out and butt-connected it back together to get me home that day. Been like that ever since, and the truck has not died or failed to start since then.
Adams' Apple2009-10-09 10:51:56

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Joel Adams
C3VR Lifetime Member #56    
My Link


(click for Texas-sized view!)             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Dave, sorry to here you are still chasing the problem. It does sound to me more like an electrical issue then a fuel issue.

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Brian - NCM Lifetime Member

73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System