Ok, the coolant leak problem is no more, found that it was on the turbos with 3 vacuum leaks, sucking up the coolant from the leak, odd as it may seem.... that problem is over with.



I drive the car around for the day and it runs perfectly.

I park the car, and the next morning i go to class, and once in a while the car will buck...

I park the car at school, go to class, come back, and on the way home the bucking has become more frequent and more violent... plus now everytime i try and get into boost the car will back down and buck...



I park the car at home, i check the MAP sensor and the TPS sensor voltage on the PFC, both are fine, both are fuctioning and are connected.



So now i have a friend come over and we are gonna see what the problem is, but now the car bucks ALL THE TIME and its impossible to drive.



I park the car, can't seem to find the problem, it feels like fuel cut, so i'm beginning to wonder if one or both of my primary injectors has failed.



Car has 98,000miles on it, but brand new engine. The car will not start now, the car has new plugs and wires, and voltage to the coil packs. Am i just not getting any fuel now? The pump is running...



Any Thoughts?

if its doing it at a steady speed, it might be the o2 sensor



mike

disabled the 02, still have the problem.

what color is the car?



mike

what color is the car?



mike[/quote]

haha :bigok:

i have had the pins back out of the connector on me before. did you replace the engine wiring harness? are there any codes?



mike

I'm running a PowerFC, i check the connectors on the harness and the ECU...



I checked all the grounds, they are fine...



I always seem to have the weirdest problems...



The car is VR..lol



If you want i can list every mod i have, but i'm afraid it would take a long time... maybe it would help?

we had one where when it got warm it would intermittantly die, it turned out that the crank angle sensor wires were bad somwhere in the harness



mike

i have voltage to the crank angle sensors, beginning to think the my primaries are plugged or something...

its possible, i'm trying to think of something stupid it could be though



mike

well tomorrow i'm going to bench test the injectors, and if they are plugged or malfunctioning, i will send them to RC, but ya, i'm leaning towards some stupid problem, but the thing was that it got progressively worse throughout the day, but ran fine the previous day, now it just sits in my garage and won't fire, it will spin, but no fire... its depressing, i still haven't even broken in the damn engine.

yeah that sucks



mike

OK, problem found, plugged primary injectors... sent them to RC, we'll see what happens Wednesday when i get them back.

The injectors didn't fix the problem, the car still spins and spins...



I put new (used) coil packs in the car and changed the plug wires just in case, the coil packs are fuctional, they came off my buddies car, and the car still spins and spins..



The voltage on the PFC reads 12.0v, then drops to 9.0v when starting (dont' know if that matters)



SO, now its got new plugs, wires, coil packs, injectors, its a NEW engine, and it still just spins and spins. The exhaust still smells like gasoline and yes the fuel pump is new also, i'm running a walbro. This straight driving me nuts and i need my car running.. please someone, anyone?!

:rant: https://www.nopistons.com/forums/pub...IR#>/dunno.gif https://www.nopistons.com/forums/pub...IR#>/dunno.gif

sonds like what my car was doing. I know you said it was a new engine but I suggest you do a compression check. One of your seals might be stuck. If so then do the ATF trick. was your car sitting for a while before this problem? If it was then this might be your problem. Mine sat for three weeks while I waited for clutch parts and a transmission. After installing all of the parts the car wouldn't start. I thad the same simptoms your car is having now. When a compression check was done I had 2.4 to 1 on one rotor and 3.6 to 1 on the other. That was after three weeks and my engine only has about 55k on it. Just humor me and try the compression check there is no harm in it. BTW I hope this works for you.

i tried the atf before, but it didn't work, but maybe i was doing it wrong? care to explain it for me?

here you go ATF

Hope this works out for you.

What do most of you pull voltage wise when trying to crank?

it should be more than 8v while cranking, 12.4 when its off and 13.9-14.1 when its running



mike

Mine goes down to 9. With the car on, it's appx. 13.5~13.7 and car not running, with the switch ON, it's 12.2~

my alternator pulley wobbles a tad bit, its tight but possibly is the alternator bad?

You could take the belt off and grab the pulley see if it moves up and down or in and out. It shouldn't move much. Could be the bearing is going bad. Or it could just be a pulley that isn't quite true.

wow, i've never heard of the atf trick. now do you guys i should do it to my car when it comes out. it has about 120k on the chassis and about 6k on the motor????

if you put a timing light on it does it flash when you crank the car?



mike

maybe i have a bad ignitor?

nope, checked ignitor, and crank angle sensor and ecu.. so what am i left with? the actual wiring harness? i still get fuel and spark, and i hear compression... :stickpoke:

see if you get the cas signal at the ecu, or make sure the cas wires have continuity, ive seen a couple that were bad there



mike

Are you using a Haltech? Did you mess with the ignition wires in your steering column at all?

if you recently had the car apart, could you have focked up the TPS?



just another idea, if you have not gone there yet.



it does sound like an ignition/spark sort of issue, and not fuel related....however, i was wrong once before....

well the tps pulls pretty good voltage on the pfc...

check to make sure the ecu sees the crank angle sensor signals, ive seen those wires bad in the harness before



mike

i get an rpm signal, that would indicate the CAS is working no?

Yes you are right. How many rpm did it register?

yup, thats right. its time to reread the thread and look for something else



mike

damn it its an fd they all run.

its time to go back to the basics.

1. pull the plugs out, clean them and then crank the motor over with the throttle floored. you should be able to hear compression, and it should smoke from the plug holes

2. put the plugs back in, put a timing light on it. try to start it. does the light flash?

if yes: with the key on engine off, jump the fuel pump (its in the diagnistic box), you should be able to hear fuel running in the lines

if no: does the ignitor get 12v? how about the coils? try another ecu, see if you get any codes



mike

does 200-300rpm while trying to crank, tried the ignitor already,fuel pump is running, i get mist out the plug holes, um spark plugs look brand new still, exhaust smells like fuel, unflooded, no starty...

Well i FINALLY got the car back on the street. you will never guess what it was. https://www.nopistons.com/forums/pub...#>/biggrin.png





Well i changed the fuel filter and blew out the hardlines, still no fuel pressure.. pumps running and such.. the usual run around. We take the pump out.. well the O-Ring that goes from the pump to the Tube/hat had come out, and the pump was pumping the fuel, but when it would pump, some would dump back into the tank.. ie no fuel pressure. Reinstalled the o-ring and bent the bracket to make sure the fuel pump won't come lose again.. Btw i run a walbro fp...



My problems are solved. I'd like to thank everyone who helped me out! Remember... the 7 never dies.

https://www.nopistons.com/forums/pub...#>/biggrin.png