1986 monte carlo surging

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08-29-2009, 01:59 PM

monte1986

Thread Starter

Join Date: Aug 2009

Posts: 2

1986 monte carlo surging

I just purchased a 1986 monte carlo with 305 v8, this car is in wonderful condition, all seems perfect accept engine seems to surge and hesitate at a stop light,, and at low speeds seems to like surge in and out, but when you mash on the gas, she is strong.. Maybe someone can tell me what this sounds like please

btw, i changed fuel filter, and still problem. any help would be appreciated, thanks

08-29-2009, 02:07 PM

Space

Join Date: Jul 2008

Location: Beach`in Florida

Posts: 33,585

Welcome to our Monte Carlo Family.

For member's to be able to assist in your problem, please post
additional information.
1. How many miles on your 86 Monte ?
2. Is it factory stock without mod's ?
3. How long has it been sitting before you purchased ?
Are you still on your first tank of gas ?
4. Do you have the history on your Monte.

Sounds like it could be your carb...Is it the factory
2bl ?
5. When was the last time it was tuned ?
Plugs/wires/Distributor ?
6. Do you have mechanical skills ?

Look 4ward to your answers & as much infor that
you can post about your Monte...
Oh, we would love to see pictures.

Last edited by Space; 08-29-2009 at 02:34 PM.

08-30-2009, 03:48 PM

88ss408

Join Date: Jul 2006

Location:

Posts: 518

yeah a little bit more info would be good . but it could be timing related

09-01-2009, 07:45 PM

monte1986

Thread Starter

Join Date: Aug 2009

Posts: 2

thanks for your responces,, i have replaced plugs, wires, cap rotor button, and still has the problem. This car appears to have the quadrajet carb, its 100 % original, and only has 55,000 org miles, it is a really beautiful carlo,, pics are on the way.. Could this be fuel related? jus need some help please

thanks

09-01-2009, 08:59 PM

Budsjlm

Monte Of The Month -- September 2012
Monte Of The Month -- February 2016

Join Date: Jun 2009

Location: Inver Grove Heights, Minnesota

Posts: 7,752

olmost sounds like the torqe converter could be locking up incorectly

09-01-2009, 11:52 PM

TheMonteMan

Join Date: May 2009

Location: nj

Posts: 1,910

may have a vacuum leak might want to check the lines off the carb.

09-09-2009, 08:28 PM

BlenderHead

Join Date: Dec 2008

Posts: 6

had same prob with 87 305. mechanic disconnected and plugged some vacuum thingy, EGR valve maybe?? or vacuum advance on dist?? not sure, i'll check it out under my hood and try to get back to you tomorrow. anyway, i havnt had the surging problem since.

09-10-2009, 10:51 AM

BlenderHead

Join Date: Dec 2008

Posts: 6

Under the hood, removal of the EGR will eliminate surging and increase cruise gas milage at the expense of some increased NOx. Removal of all vacuum lines feeding it will accomplish this.