hey, all.
my 97 monte ls 3.1 v6 has been great so far, but i think it might be ill. i had made a post a while ago about how there is a dead- spot under acceleration, and now that i have been driving it more it seems to have gotten worse. it only does it once its warmed up, but its just dead between 5-20 mph and 30-45 mph. i wach the tach, it does not budge above 2500 rpm untill i pin the throttle at wot, then the car downshifts. i hold it to 4000-5000 rpm, let up, it shifts into drive and im fine. why would my car act like this? could it be a sensor in the trans?

now i have a new problem: the car is starting to idle funny once warmed up. it does not stay constant, it kinda idles from below 1000 rpm ( 950 ish) to maby 1100 ish rpm. just enuff to notice it, but only if you are looking for it. trying to start from a dead-stop ( like a red light) causes the rpm's to dip way down, and the car almost stalls. almost. but then, with a big shudder, it gets moving, and is fine other than that dead- spot.

the car has a newer engine that should not have these problems, fresh plugs, fuel filter, air filter, a new TPS, fresh oil & filter. the car and trans have 153,000 miles on them to the best of my knowlage, the engine has less, but im not sure how many less. ( all the old stuff i removed for the tune up on the engine were still new)

any help is appreciated, thanks!

 

is check engine light coming on?

 

hmm piston miss firing?

 

Hi `Ryan, I've searched & searched all my web resources 4 a same & similar problem, but could not find I'm puzzled <~ok, all the time
Has your dad looked @ it ? It is difficult to diagnosis just by the written word, and not having the test equipment to pinpoint the possible problem.
Wish U good luck in resolving your issues with your Monte.

Really, what does a alien know about human cars ? What ? Lol

Hopefully one of our expert memebers with have a solution/suggestion for U.

 

Have you checked your EGR Valve? I know that it can cause an surge when warming up. Mine does it and i know its bad. but i am living with it till i can buy it. Now you might to see if maybe you IAC valve is also bad.

Just a thought.

just thought of something. Your "FLAT" spots could also be one of your coil packs also.

 

Ignition Coil/S? Maybe?

 

all those new filters and plugs and you didn't get new wires?

I'd finish your new with a new set of coil packs and a set of wires. Shouldn't run you too much. See where that nets you, and hope the problem gets fixed

 

thanks for the help, guys. chris, i dont have a check engine light on, but i am getting a "service engine soon" light. i am gonna bring the monte up to autozone to have them hook it to a scanner today, hopefully that can shed some light on whats wrong, i'll let you guys know what it says. i guess while i am up there i will see what a new coil pack is gonna run me, along with the EGR valve and the IAC valve, and ill probibly get new wires, though like i said the wires and the old plugs i removed were like brand new, i have the old plugs in the trunk as extras.

thanks again, everyone!

 

I didn't see where you said the wires looked new...

but if the stuff is cheap and easy to replace why not peace of mind is good to have.

 

crudded up injectors?