fuel issues - Page 2 - ZR-1 Net Registry Forums

tomtom72 · 05-05-2008

In the fuel pump assembly.....not in the pumps but attached to the assembly that ya pull out to change the pumps....is a thing called a Pulsor...if that goes south you will not hold F/Pres at the schrader valve for very long during the KOEO test.

Just a fwiw.. oh, don't forget to get a new sock filter.

Tom

bradslt5 · 05-05-2008

tom thanx for the info I didnt know that. so it will do what he said his did?

-=Jeff=- · 05-05-2008

Ken,

I would almost pull the plenum and remove the injector rails with injectors and turn key on, put a pan underneath the injectors to verify if one is leaking..

flyin ryan · 05-05-2008

Quote:

Originally Posted by -=Jeff=-

Ken,

I would almost pull the plenum and remove the injector rails with injectors and turn key on, put a pan underneath the injectors to verify if one is leaking..

sounds like the best plan to me as well.

Ccmano · 05-05-2008

Quote:

Originally Posted by flyin ryan

sounds like the best plan to me as well.

Bet you it's an injector...

Hans

bradslt5 · 05-05-2008

thats what it sounds like to me also , but i think he said he just changed them? guess one could be bad out of the box .

Toyvet1 · 05-05-2008

Game plan is to replace the pumps and pulsator in the morning. I betting the plugs are gone so they get replaced. Jeff you think with gas out the pipes the oil might need replaced(LOL). Oil gets changed. Im going to start it up and see what happens. If the problem is still there the plenum comes off. Ill pull the injectors and check for leakage. I have a hard time thinking one or two injectors would make a car run as bad as it is. Both pipes billowing white smoke would be more than a injector from what Ive seen.Jon from Fuel Injector Connection called and offered what ever I need when I found the proble. What costumer service!

Ccmano · 05-06-2008

One things for sure, if it's billowing white smoke from both sides of the exhaust it's not the fuel pumps causing the smoke.

A bad fuel pump (had it on my car) will usually show itself as a lean or loss of power condition at high rpm or the car won't run at all.

A stuck injector will cause an over rich condition on one side and usually results in rough running and black smoke. Gas coming out the tail pipe is possble but only on one side.

You don't have an X-pipe on there do you?

In my experience with white smoke on a manual trans car is usually a bad head gasket, but again only out one tail pipe, the side with the bad gasket.

You mentioned you just fueled the car before this happened, is it possible you got a bad batch of gas? Wouldn't be the first time.

Bottom line for me, this really doesn't sound like fuel pumps, there's something else going on here

GoodLuck,
Hans

tomtom72 · 05-06-2008

Good catch Hans! I read right past the "white smoke" !

Ken, you 100% that the smoke is white?.....as in steam = white??, or it just looks kind of white...could be gray to charcoal color type of smoke but it's a "hard to tell" deal????

JMHO, white could be a head gasket, like Hans says.....or....the injectors are not leaking, rather they are not working so the white smoke is a lean condition....JMHO.
I hope if the smoke is truly white, that it's a lean condition.

tom

bradslt5 · 05-06-2008

where is the pulsator located on the fuel pump . think i may ahve a bad one as i pull the fuel rail assembly cuz she wasnt holding pressure but found no leaking injectors, or any leaks at the fuel rail. could a finicky schrader valve cause this ?

05-05-2008	#11
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: fuel issues In the fuel pump assembly.....not in the pumps but attached to the assembly that ya pull out to change the pumps....is a thing called a Pulsor...if that goes south you will not hold F/Pres at the schrader valve for very long during the KOEO test. Just a fwiw.. oh, don't forget to get a new sock filter. Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

05-05-2008	#12
bradslt5 Join Date: Oct 2007 Location: lone pine and mammoth lakes ca. Posts: 544	Re: fuel issues tom thanx for the info I didnt know that. so it will do what he said his did?

05-05-2008	#13
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,152	Re: fuel issues Ken, I would almost pull the plenum and remove the injector rails with injectors and turn key on, put a pan underneath the injectors to verify if one is leaking.. __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

05-05-2008	#16
bradslt5 Join Date: Oct 2007 Location: lone pine and mammoth lakes ca. Posts: 544	Re: fuel issues thats what it sounds like to me also , but i think he said he just changed them? guess one could be bad out of the box .

05-06-2008	#18
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: fuel issues One things for sure, if it's billowing white smoke from both sides of the exhaust it's not the fuel pumps causing the smoke. A bad fuel pump (had it on my car) will usually show itself as a lean or loss of power condition at high rpm or the car won't run at all. A stuck injector will cause an over rich condition on one side and usually results in rough running and black smoke. Gas coming out the tail pipe is possble but only on one side. You don't have an X-pipe on there do you? In my experience with white smoke on a manual trans car is usually a bad head gasket, but again only out one tail pipe, the side with the bad gasket. You mentioned you just fueled the car before this happened, is it possible you got a bad batch of gas? Wouldn't be the first time. Bottom line for me, this really doesn't sound like fuel pumps, there's something else going on here GoodLuck, Hans __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

05-05-2008	#17
Toyvet1 Join Date: Dec 2007 Location: Bloomingdale, Il Posts: 330	Game plan is to replace the pumps and pulsator in the morning. I betting the plugs are gone so they get replaced. Jeff you think with gas out the pipes the oil might need replaced(LOL). Oil gets changed. Im going to start it up and see what happens. If the problem is still there the plenum comes off. Ill pull the injectors and check for leakage. I have a hard time thinking one or two injectors would make a car run as bad as it is. Both pipes billowing white smoke would be more than a injector from what Ive seen.Jon from Fuel Injector Connection called and offered what ever I need when I found the proble. What costumer service!

05-06-2008	#19
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: fuel issues Good catch Hans! I read right past the "white smoke" ! Ken, you 100% that the smoke is white?.....as in steam = white??, or it just looks kind of white...could be gray to charcoal color type of smoke but it's a "hard to tell" deal???? JMHO, white could be a head gasket, like Hans says.....or....the injectors are not leaking, rather they are not working so the white smoke is a lean condition....JMHO. I hope if the smoke is truly white, that it's a lean condition. tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

05-06-2008	#20
bradslt5 Join Date: Oct 2007 Location: lone pine and mammoth lakes ca. Posts: 544	Re: fuel issues where is the pulsator located on the fuel pump . think i may ahve a bad one as i pull the fuel rail assembly cuz she wasnt holding pressure but found no leaking injectors, or any leaks at the fuel rail. could a finicky schrader valve cause this ?