In 3,4, & 5th gear I get wicked sputters that shake the truck. Not in 1st or 2nd tho. In third usually starts to sputter at 2300rpm. 4th can at 2000. And 5th I havent had alot of driving in 5th to know what rpm but im sure in the 2-3k range. I did put in a different air intake. That is on solid I just checked it. However it didnt do this until about a month after I put the intake on. Im thinking its a problem somewhere in the fuel system since it only does this when im gassing it. Should I look into replacing the fuel filter and pump? When im off work this morning Im going to do a sea foam treatment in the tank. See if that does anything. Any ideas would be appreciated. Thanks!

Another question. When putting on aftermmarket intakes increasing the amount of air going into the engine, does that mess with the air/fuel mixture? Maybe Im getting too much air now... my trucks an 88 22re.

 

Ive read it could even be a bad catalytic converter now. That doesnt really make sense to me tho...

 

Bump

 

i would start with fuel filter. What motor do you have? carb or EFI? If carb you could have some crud in a jet of the carb. It happened with my ex flopped my toy, didnt want to run, eventually cleared up. Also had the same thing happen to my VW which was crud in main jet of the carb.

I have also had a plugged catalytic converter, with that I just had mass lack of power and would only cut out/sputter when floored. Could gently increase gas and would do ok just no power.

hope that helps some

 

EFI. Thanks for responding! I'll definitely switch the filter out when I can.

 

How does it idle? If it only happens on accel, it could maybe be the MAF going bad - but for this ud prob get a Check engine light. And yes, like CBO said, it can be that the cat is bad/clogged - this condition does not always throw a CEL

 

filter

 

Well i had the exhaust re-done with new muffler a month back. They used the same cat but i find it hard to believe they wouldnt have checked it and it seems like alot of flow is coming out. Idle is just at 1k or a bit below. If its below freezing it can be 1300 but once it warms up its fine. No check engine lights. And driving home the other day i heard a very loud sound coming from drivers side under the hood. Scared the crap outta me. I pulled over. Looked it over. Saw nothing.

What fuel filters are the best? If Im changing it I might as well go big.

 

easy way to find out if it plugged is heat test

you exhuast will be hot i mean hot if it plugged and it will be very slugish and may smell if sitting for some time and be more quite then normal

if you take the cat with hammer and it does not make nice thud sound it's broken apart


as for filter oem replacement will be fine

 

Ya theres one thats 16.99 and one thsts 26.99.

Would an old fuel filter explain why it sputters in 3,4,5 but not 1,2? If it wasnt geting enough gas throigh ud think itd happen in all gears.

 

the more load you applie the more fuel the motor will want


here is one for you to try do it when it is bone cold right out he drive way and give run for it's money

since you car is in closed loop aka autopilot tell it warms up


if still doing it then you have an issue such as ware items plug's cap rotor fuel filter ect

 

I'll be doing this over the weekend. So ur saying if its fired up cold and tested in those gears and it DOES still do it then it would be pointing more towards fuel filter? Or other way around?

 

closed loop run's on autopilot. basic warm up it runs on setting from the ecu with no changes done by sensors.

so if still have the issue it's from hard source like fuel delivery or spark or ecu is ****ed or bad wiring

 

Well I took it out and it was hard to test it because my damn city has a light every 50ft! And for some reason it was traffic heavy too. But i did get 3rd gear up to 3k rpm no sputter. It started to sputter again a little bit later but it may have warmed up. I'll hafta test it again later to be sure. If it doesnt sputter off cold start what are other possible diagnosis?

 

all ready told ya

 

I think u said both things for if it still sputters. Lol, i just filled up and sea foam treated the tank. Who knows... if im lucky it'll do something!

 

It was weird. Right after seafoam was in the tank I started it up and the idle went down to 800 or so. Just like that. That seafoam is crazy stuff. Still gotta do another cold start test tho.

 

sea fome does not work that fast it's no magic lol works good thou for cleaning injectors

 

Sea foam is just kerosene and alcohol and pale mineral oil . It does help clean injectors but no means a mechanic in a bottle u can make it your self same as the gm top end service cleaner same stuff . The most potent gas treatment/cleaner is redlines fuel treatment it's pretty much straight high grade kerosene .

If you have a nylon filter sock on your fuel pump pickup tube for you Efi guys u wanna stay away from products containing monoethanolamine it dissolves nylon on contact

 

Well its weird tho cuz it definitely runs better already and doesnt sputter out as easily so cleaning out the injectors did some good. After test 2 It does not sputter during the cold run...