After my cam swap, the car wants to idle pretty low (500 rpms) and it's pretty lumpy.. Is there any way to set the idle at like 900 rpms instead of that low?

 

The timing was wrong, it fixed most of the problem.. It idles kinda shaky but not like it's missing...

I'm not really sure what to do...

 

a lumpy cam is the product of it's initial lift rate compared to the volume of the cyl.
so any time you add a bigger cam you will get a little more of a rumpity note to the engine.
i gues the cure is to buy a bigger engine but then you'll realize how cool it sounded before and hafta put in a bigger cam then your g/f will complain about the new cam so you'll hafta buy a bigger engine but then you'll dump her when she calls the car dumb and go get anopther bigger cam ......you can see where i am going with this

later
tim

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91 Camaro RS-LO3,Auto
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yeah, eventually i figured that it was just going to be that way.. as long as it's not too hard on the engine at idle then I'm fine...

I actually thought it was misfiring but it runs too smooth above 1000 rpms to be missing...

 

My car was running really terribly at idle until I realized I forgot to plug the vacuum tube. ;P


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1992 Camaro RS (Auto) 5.0L TBI
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Performance mods
NOS (125 HP shot)
Dynomax cat-back exhaust
Hedman headers
K & N open element/ X-Stream lid
MSD 6A ignition
MSD 8.5mm plug wires
LT1 camshaft
Soon to be installed:
Edelbrock intake manifold
B & M 2400 RPM stall torque converter
Trans Go shift kit
World Products Torquer heads

Audio
Sony Xplod CDX-M610 head unit
Pioneer 2-way 4x6 front speakers
Pioneer 3-way 6x9 rear speakers
12 inch Pioneer VCCS PRO subwoofer
QLogic sealed box
Kicker ZR360 amplifier
Lightning Audio 1 farad capacitor

Other
Macewen White Faced Gauges/Shift overlay
A-pillar gauges (Phantom oil pressure, Air/Fuel)
180* thermostat
Window Tint

 

I already posted the solution on your other post. Adjust the IAC as I described and it should cure the problem. The low idle is your problem. If you've never adjusted it before, there is a thin sheet metal plug covering the adjusting screw that has to be removed first with a pick or small screwdriver. But remember to have the connector disconnected from the IAC when you make tha adjustments. Good luck, Lon.

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90 RS Convertible
Owner: Top-Down Solutions
(626)369-0040

http://www.sc3gfb.org/members/lonsal.html
http://www.taskerinc.com/gs3/profiles/Lon_profile.htm

 

Yup I had the same lumpy problem and just adjusted the IAC and its fine. The lt1 cam is a little lumpy and I thought I had a problem at first.

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One Tight Teal green 91 RS (my first car
All Rustangs suck!!!!
5.0 TBI with Auto trans
Z-28 wheels
K&n with dual snorkel intake
Tx Smog Pump Delete option
Valve cover breather
Rapid Fire plugs with Accel ignition wires,coil,cap and rotor
Flowtech headers with flowmaster and Half way cutout
B&M shift kit with trans cooler and hurst hotshift fulid
Hypertech thermomaster chip
96 LT1 cam with
New liffters and timing chain
All the free TBI mods