REDnDirty

hello all, i am stumped with this car, i have replaced everything on this car and i still cant set the timing right, when i set the timing it all lines up, 10 degree before tdc with the wire unhooked, every sensor and hose is new, the car has 320xxx miles. could it really be the camshaft? has anyone had this many miles on v6? The sensors were replaced at 319xxx miles, they were all orignal =, replaced ecm 3 times now, so could it be timing chain or cam?? motor doesnt leak a drop of oil or a drop of coolant

Six_Shooter

iTrader: (2)

So what's the issue?

Are you saying that you have a timing issue?

You say that the timing gets sets as it should be when you go through the procedure, so I don't understand what your issue is.

REDnDirty

after i get the timing set and go for a test drive it idles good, when i put it in gear it stumbles and pops and wont do more than 5mph in first or second gear. it looses power after 1500 rpm but sounds good when in nutral and revs up fine to 4000 rpm

Six_Shooter

iTrader: (2)

Have you checked fuel pressure? Have you check for a clogged catalytic converter?

REDnDirty

New fuel pump fuel filter fuel pressure regulator new lines new injectors, catalytic converter was checked by muffler shop

Six_Shooter

iTrader: (2)

But have you checked the pressure? Just because those parts happen to be new does not mean they are good.

REDnDirty

45 psi when running

RBob

iTrader: (1)

Have the injectors ever been replaced with non-Multec units? If not that is the first thing I would do.

RBob.

firebird904

I had a problem similar to yours on my old 2.8 fiero and my balancer had slipped making it impossible to time right. Also make sure it's 10* on the compression stroke and not exhaust stroke.

Blaze of Glory

I had a problem where my timing wouldn't stick. I replaced most of the distributor parts and it didn't help. After more investigation, I found that the pole piece was loose and would slip, along with the timing. I just bought a new distributor assembly and it fixed it up good.

zs&tas

Hapenned to me on my five speeder, the same time it had a coolant sensor issue, replaced the sensor all fine now, not sure what happened really though. Have you tested the coil?

RubberDucky

iTrader: (4)

Its most likely this. The OEM Multec injectors just fall apart.

willexoIX

^^^^^^THIS.

Gumby

shhhh far as I know I got the original 230K miles injectors on mine...

RBob

iTrader: (1)

'86s didn't come with Multecs.

RBob.

Springster

Block off the EGR at the throttle body with a thin metal plate just to make sure it's not an issue.

REDnDirty

Hello again, and heres a list of new parts. Not rebuilt or refurbished but new. fuell injecters, gas tank, fuel line, fuel pump, fuel pressure regulator, complete distributor, spark plugs, coil, spark plug wires, TPS,MAP,EGR, Kncock sensor, coolent temp senser, ecm, every relay, oil sending unit, alternator, ground wires. im in the process of pulling the timing cover and installing a double roller timing chain. car has 350+ thousand miles. i didnt want to pull the timing chain but out of sensors to replace. so replacing the timing chain and have a new cam on its way. will update when problems resolved

broke91firebird

I don't see the timing chain on your list. Do you know when the last time it was replaced? I wonder if it could be giving you issues if it is still stock after 320,XXX?

REDnDirty

hey again, finally got around to pulling the timing cover, easy all get out, and the chain has stretched 1/8 of an inch. doesn't sound like much thats alot. so i replaced it and when the rain quits today i will install everything else and fire it up for the first time in 5 months. will respond when fired up

REDnDirty

so timing chain did not fix it, is there a way to bypass the FPR?

Six_Shooter

iTrader: (2)

Why would you want to bypass the FPR?

You'd get very low fuel pressure, or possibly none at all.

Also bypassing anything is not a repair, it's a hack at best, and won't usually help to diganose what ever problem you are having.