1993 chevy lumina mini van problems

[skullking]

when driving down the road from a dead stop it would start to jurk then die.it keep doing it worse and worse now it wont start. i parked it and checked to see if fuel would shout out of befor fuel filter to front of car but it poured out like a hose no pressure i then checked it at the engine it barely cam out at all.i was told it was the fuel pressure regulator but some one else told me it was the fuel pump. i replaced the fuel pump and filter. now it has pressure at the engine but when i try to start it it chugs then pops and dies.if i keep tring it it reves up with the peddel down but tryies to die at an idol.can u give me an idea of what to try next plz.plz email me at [email protected] or let me know asap thanks again.

['97ventureowner]

Moving this to the Lumina APV forum.

[LMP]

Originally Posted by skullking

..i was told it was the fuel pressure regulator but some one else told me it was the fuel pump.

3.1 or 3.8?
Was a fuel pressure test done or was it just guessing? With just KEY ON, the pump runs for a second then stops and waits for engine to start before coming ON again. 3.1 pressure is 12 psi, 3,8 42psi.

Is the Check ENgine Light ON? ...CHeck for codes here: www.avigex.ca/xport/readingcodes.jpg (jump connect A and B, turn key ON, read CEL flashes).

[skullking]

im sorry it is a 3.1,yes a test has been checked and when the key is on the pump should stop i thought after a little bit. but i continues to run and wont stop and or start and stay running by itself

[LMP]

Originally Posted by skullking

..the pump ...continues to run and wont stop and or start and stay running by itself

?!? ...I kind of understand the fuel pump runs and you have fuel pressure...unless you say otherwise. Can you look inside the throttle body and confirm you see a brief jet of fuel at KEY ON ?

I'd pull a spark plug and check for spark....ignition module failure is quite common at that age...and my position here is that having a spare is kind of a must...but check for spark, anyway. Simple things must not be overlooked.

[skullking]

i checked it and it has good spark.now it started up but is doing the same thing. (when u go from a dead stop accilerating 0-55+ i like looses power jurkes,gas gage jumps and it tries to die).any ideas thanks again bye the way yes it shouts out the gas does anyways my brother-in-law is going to bring over a computer to check it again soon last time it had to many errors. do u think it could be the fuel regulater modual?

[LMP]

..failed TPS (throttle position sensor) might very well procure those jerky symptoms. It would light up the CEL with a code 21 or 22. Is the CEL ON?
www.avigex.ca/xport/TBI.jpg

[skullking]

we went to try it today and it wouldnt start at all. we hooked it up to a computer and it doesnt say anything.however my brother-in-law said it is suppose to run for 15 min first.u have any ideas plz. or u think it might still be that tps.

[LMP]

Is the Check Engine LIght ON ??
If CEL is ON, use instructions above to read the codes. (if you disconnected the battery, the codes are gone).

[skullking]

the only time the check engine lite was on was right befor u start it other than that there seems to be no codes at all

[LMP]

Originally Posted by skullking

...when u go from a dead stop accilerating 0-55+ i like looses power, jurkes,gas gage jumps ...?

.You mean the needle goes up and down? That looks like an electrical problem. Ground problems have been reported several times. HOw do all accessories behave? Will power windows , power seat, heater fan all work normally? And other instruments, like oil pressure, tach..?
Use a voltmeter: Do you have 12 V at battery..and once engine is started, what is voltage? SHould be near 14 volts. Did you have to recharge battery lately ?

[skullking]

i just found out it is a 1994.but it is still not starting do u think it could be the timming. it cranks. but how can it be that if it was drivable when running?

[LMP]

Please reply to these:
HOw do all accessories behave?
Will power windows , power seat, heater fan all work normally?
And other instruments, like oil pressure, tach..?
Use a voltmeter: Do you have 12 V at battery..
and once engine is started, what is voltage? SHould be 14 - 14.5 volts.
Did you have to recharge battery lately ?

'94...so it has the rounded headlights (94-96) www.avigex.ca/xport/DSC06466.jpg
and not the wedge shaped type(90-93) www.avigex.ca/xport/headbeams.jpg ..right ?..
and it has a brake light at top of rear gate window...
HOw is the underdash plug for the computer:
Does it have connectors A and B? If B is not there, it needs to be read with a scanner.

Timing?...the distributor would have to have been rotated....YOU said you had spark.... so try to borrow a timing light and clear that issue...and once started it runs normally..right..except when you waht to accelerate, it starts bucking, as I understand. What speed can (could) you reach ?

Without adequate tests, this is all guessing.
Arrange to measure fuel pressure. YOU must have 12-14 psi!! It is "possibly" , may be probably OK..but until measured, it is not proven.

...I still suspect the ignition module......
a high risk item at that age...(this is guessing)....

[pizza1]

Could be plugged catalytic converter in exhaust. Try cutting pipe in two, just ahead of converter and start engine. You can install a short connector pipe and clamps to reconnect. My '91 did similar and drove me nuts....it was converter.