so i got my new engine and put it in over the week. i did a street port with 3MM seals on it, and i put it all back together and now it doesnt want to stay running! to start the car i have to pump the gas alot and then it will finally kick over and will idle. but if i try to give it any gas it will jus bogg down. and it i put the gas to the floor it will die. the RPM's wont go over 2 1/2 K. I dont know if it could be timming or a bad coil pack or what... any help guys would be great!!!!
Thanks.
Ryan

 

o and i dont have my Power FC in yet. still waiting on it in the mail

 

I'd start by looking for vacuum leaks after the throttle body, and double-check that the MAP sensor is hooked up. It's likely something simple that will take 2 days to uncover .

Dale

 

i have chekced all the lines. i am non-seq so i only have like 7 lines. and the MAP is in. but at idle (which the car is ideling at 300 RPM) the vaccum gauge is showing like 8

 

primary injector issue or major leak
hey 8 is an awesome vacuum for 300rpms I get 14-15 at 875

 

so it's idling below the 500 rpm mark?

Tim

 

You can't pump gas with a fuel injected engine throttle.
Coil packs do not go bad during an engine replacement.

New engines are harder to start due to being tight and wanting to foul the plugs due to extra lubricant in the chambers.

Adjust your idle up a little to counteract the tightness, 1/4 turn throttle screw..

If you have an ignition amplifier that can muti spark, turn it on.

Test you static fuel pressure per Mazda's intrutions.

Check your TPS voltages.

Make sure your water temp sensor and fuel temp sensor do not have their connectors reversed. They both are the same type and are green. This will cause the engine to always idle rich as fuel temp does not warm up.

 

your idle is way to low, bump it up to 800rpm at least. also, did you check/replace/clean your sparkplugs?

 

yeah the car idles under 500.
i put brand new spark plugs in.
I thought it might have been the fuel pump but i took it out and re-did EVERYTHING and it still runs the same!
DAMN this is frustrating!!! the car has been down since May 7th and now that i get everything back it still doesn't work.

 

You need to adjust the idle Danielson.

 

who did your motor??

 

his name is karl Martin. He is really known out here!

 

and also when i have the car in idle and then try to give it gas it back fires like crazy!

 

Check your fuel pressure, sound like a fuel issue to me.

 

check to see if the throttle position cable is plug in.

 

how do i check the fuel pressure?
and yeah the throttle is plugged in.

 

Have you pulled any trouble codes from the computer? Is your check engine light on?

 

the check engine light is on sometimes. it has always done that since i went Non-Seq. i dunno if one if the resistors is lose or something.

 

has anyone heard of walbro fuel pumps not being good? cause im starting to think that it might be that, its brand new but it just seems like the engine isnt gettin any fuel.

 

Have you checked your air/fuel ratio? I'm experiencing similar symptons after the new engine went in. Sometimes, but not all the time, the car won't go above 3k rpm and when I look at the A/F, the reading jumps from 10.5 to 18 and above when I press the throttle and get no acceleration. I think my problem lies with the fuel pump and/or the fpr as the previous owner has swapped in an external pump of unknown origin and there's strange noises coming from the device. The car will boost happily to over 1 bar say on my way out to the supermarket and maintain an A/F of 11 but on restarting the car for the return trip, the fuel starvation problem will resume. I've pretty much discounted problem with the ECU or the sensors as they shouldn't cause the on or off fuel problelm if something is permanently shot.