ok i just got home from takin my new girlfriend out and while i was driving my 84 started to spit and sputter around 1st gear. now i dont know if it was me letting up on the gas. but it happond more then once , i really dont no what to do if its me or not but i want be carefull. i has not happond once i get into maby i would say 2 and up its getting out of first is when i have the prob. and it happond one time when i came off the line some wehre around mid 3rd. and it never used to do that. now im more scared about the car then the girl. thank you for all your help



:mad i think the girl jinksed my car ( i dont no if thats spelled right but you get the idea)


Cory

 

Cory,
I'd be willing to bet your fuel pump is dying. The '84's are known for this.
Come over to the Crossfire Forum, TONS of info there about your 84. http://www.crossfire.homeip.net:81/cftest/default.asp

 

:iagree:

Check the easy stuff first. Replace the fuel filter. If it has been awhile a tuneup might be in order. Plugs, cap, rotor etc.

 

No way, it's gotta be the girl. Get rid of her and all your problems will go away. :D

Sorry, couldn't resist.

Couldn't hurt to do a general tune up with plugs/wires, cap/rotor. fuel filter and whatnot if you haven't done it in a while. But it could very well be the pump as others here have said.

Whats the stock output pressure on an 84 pump? Don't the L98 and LT1 pumps put out more pressure? If you have to replace the pump, I'd think going to a higher volume pump and installing a pressure regulator would do nothing but good for the Cross Fire injection...

 

The Crossfire HAS a fuel pressure regulator. It's inside the rear throttle body assembly. The specification for fuel pressure is 9-13#. A GOOD stock fuel pump has no problem meeting and exceeding the needs of a mildly modified engine. I have not tested for max press from a stock pump, but during expementation, I cranked my pressure to 17#. It blew black (excessively rich) smoke down the entire 1/4 mile. I currently run 14#. The fuel pressure does NOT fluctuate during a 1/4 mile run. That is with shifting at 6000 rpms or slightly higher. If a pump needs replacing, a similarly priced later model is a good idea, but replacing a GOOD stock pump will produce NO gains in performance. I've done the testing. Good luck, and...

RACE ON!!!
1984 Crossfire
Member NHRA

 

CFI-EFI

6000 RPM. Hmmmm.
I'm taking it you have a modified intake and/or heads on your corssfire.

 

Heads, cam and the whole rest of the long block is untouched since manufacture. I have ported the begeezus out of the manifold, and bored the TB's to 2". 6000 seems to be the optimum shift point at this stage.

RACE ON!!!
1984 Crossfire
Member NHRA