hard to start

i have a 84 blazer with carb and its real hard to start like if it sits for a day its real hard to start it will crank over for at least 10 second and then it starts. is ther a sertain way i should start it or just pump it a few times? or wut idono some one help me out. oh lol and it back fires and has a hesitation on acceleration lol thanks.

I Think Its Time For You To Give That Thing A Tune Up. Most Important Is Spark Plugs, Distributor Cap And Rotor. They Are Probably So Worn It Is Drastically Changing Your Timing. Pretty Soon The Vehicle Will Not Start Anymore. Replaced Them.

it has a new rotor new plugs new wires i think it has something to do with the carb or fuel or something

fuel filter or injectors

its carbed

check your fuel pump and filter. excessive cranking means a failing pump or a clogged fuel filter. its probably a mechanical fuel pump located on the passenger front side of the block. check its flow rating.

Fuel filter needs replacing and it is time to get your vehicle's timing checked and properly adjusted.

ok i replaced the fuel filter, checked all the gaps, checked the wires again and checked the timing and the timing was at like 20 degres advanced i think and it says to put it at 10 so i put it at 10 and now it doesnt have as much power and it still has a hesitation but i think its hesitating when the secondary opens on the carb but it also stumbles a bit at lower rmps then it will rev but i think it does it at a sertin rpm and when the secondary opens does anybody have anymore ideas

Who said you set it to 10?

the peace of paper on the fan shroud told me

Weird, I never knew any truck that had the timing on the shroud.

Can anyone else reference this for me?

Fireplug?

im pretty sure it was on the shroud but its just a paper that tells the timing the rpm at low and high idle and some other stuff

You don't know for sure?

ok i just went and check to make sure and yes it on the shroud and it says catalyst next to the word timing it say 10 degres@750rpm

Ok, is there a timing wire you have to disconnect while you are timing the vehicle?

it doesnt say to disconnect anething anewear

the peace of paper on the fan shroud told me
yup a friend has one on his fan shroud ( 83 blazer s10) and it reads 8 btdc < it is on the emissions diagram>

mines an 84 an it reads 10 @ 750 rpms

Isn't there a timing advance wire that has to be disconnected on these trucks to time them properly?

Brown and beige wire going from the ECM under the glove compartment?

Hello
Wow a carb
Well this still hold true to carbs also Long crank times 9 out of 10 times = lack of fuel.
After the truck sits for a long time I want you to go to the carb and look down it while moveing the throttle (engine off) is there any fuel spray???.
The fuel pump could be back feeding the fuel out of the carb or the float in the carb is bad or the needle and set are bad not letting the right amount of fuel into the carb. I have seen base gaskets go bad and they suck a lot of air in and run lean. Grab the carb with both hands and try to move it twist it.Is this a auto trans or 5 speed .Timming different for autos and standerds. Yes timing decal is on the fan shroud
Post what you find and we will go from there
Fireplug

Hold on here, the man said he changed the timing to 10 BTDC. If he didn't disable the advance, he's timed wrong.

I'm not sure if the '83 had an ECM that would adjust timing or not, it's right around the changeover years, OR if it's vacuum advance.

He should check the distributor and see if it's vacuum or not and then retime accordingly. Since he said that it has less power since he timed it, it sounds as if he has retarded it too much.

Good catch !!
Missed that 1.
That would be VERY important indeed.

ok i checked the carb, witht the truck OFF i moved the throttle and there was no fuel spray i turned the key on cuz i figured the fuel pump would turn on and fuel would pray in the carb but nope. i sprayed carb cleaner al around the base and the carb and there is no change in idle. the carb does not twist or move. its a 5 speed. the is no vacuum on the distributor. its an 84 not an 83. were would i disconect the ecm if i had one?

Does this truck have a CARB or TBI ? I have to know this before we can move on.
TBI has 2 fuel injectors at the top of the unit with wires connected to them.If its a TBI you can move the throttle cable all day and no gas will spray with out the engine running.
A Carb has no fuel injectors but has a accelerator pump that sprays fuel when the throttle cable is moved.This type will spray fuel into the carb untill the float bowl runs out of gas.
So PLEASE tell me do you have a CARB or TBI???
These are 2 different types of systems.

If you do not have a vacuum pot on the bottom of the distributor then you have an ECM. Hmmmm, I think it is behind the glove box but if you pull your carpet up on the passenger side, you should see a small connector with only one wire, It might be brown or beige, sometimes with a white tracer, have also seen it on the pink side, But the plug is unmistakable, about 5/16" square. Unplug this, do your base timing and then reconnect.

If it is vacuum, pull the vacuum line and plug the hose, do your base timing and reconnect the vacuum hose.

I think you said that this was a V6, if it is and while your doing the base timing, after you have timed on #1 cylinder, move the pickup of the timing light to #4 cylinder and see how close it is to the mark that #1 was on. Your checking for timing chain stretch.

well for your infomation they didnt put tbi in the on the 2.8L till 86 and mines an 84 so its carbed. so the ecm is only 1 wire thats about 5/16" square. ok ill go see if i can find it rite now.

Hotwheelstg
OK now you are sure its a carb RIGHT. So you have your answer to your problem

ok i checked the carb, witht the truck OFF i moved the throttle and there was no fuel spray (if it is a carb this is part of the problem you must have fuel spray with out the truck running if you move the throttle cable it MUST spray fuel or the carbs float bowl is empty )) i turned the key on cuz i figured the fuel pump would turn on and fuel would pray in the carb but nope ( this set up has a mechanical pump not an electric in tank pump.


We need to find out why you have no fuel the long crank times and the back fire are due to a lean problem.
We together on this. Its NOT A EMC OR TIMING problem at least for now.

Hotwheelsstg
PM me please
Fireplug

ok well last weekend i had a little fun in the sun lol well it was mud and the 4x4 works great but aneways now after a little 4wheelin when the motor gets hot and i give it full throttle it will lose power and sometimes backfire out of the carb but its a little weird cuz it will game rpm if its at about half throttle but if i give it full then it will lose power not all but alot. does anybody have anymore ideas

and when i startit in the morning now sometimes it misfires like real bad and it does it for about 30 seconds or more i dono wut the proble is do you people think it mabe the carb or the ignition system?

Have you tuned the engine up lately?

lol you ask everybody with a problem that lol but i dont think another tune up is gonna help

Well, from my experience, most driveability problems are from lack of maintanence.

But thanks making me feel like shit for trying to help.

Good luck with your problem.

lol it wasnt to make you "feel like shit" i was just sayin lol but it has new plugs, wires, cap, rotor, fuel filter, air filter so i dont think thats the problem

This then still sounds like timing problem.

and i checked the timing but if i didnt check the timing rite do you think it is to advanced or retarted?

tough call really, both overly advanced and retarded can cause the same condition.

well how much over or under would cause the problem?

I don't know, you need to check yours out.

I would have a professioanl check it just to make it is timed right with the timing wire unconnected from the PCM.

lol if i had the money to take it to the mechanic i wouldnt be on here tryin to do it myself

Ok, then have a friend check it and time it properly with a timing light.

Did you use a timing light?

lol ya i used a timing light. but im kno i didnt do it perfect cuz i still dont kno were that ecm thing is. it would help if someone knew exacly were it was on an 84 2.8l?