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#1 |
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Join Date: Oct 2006
Location: MD
Posts: 3,690
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hey guys,
Car started to "stumble" @ 35mph in a big way yesterday.... Lost power and seemed like the motor couldn't breath. I kept feeding the gas and it knocked more & more. Then stalled. In order to get it started I had to push the gas and white smoke would come out in 1st / 2nd gear. 3rd gear on, no white smoke (motor had minimal power). Drove 150 miles and went thru 13 gallons of gas. Car did idle for probably 20min durring that time. What is the best way to see if the injectors are bad and if there is a coil pack problem. thanks! David |
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#2 | |
![]() ![]() ![]() Join Date: May 2007
Location: Peoria, AZ
Posts: 9,153
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http://www.zr1netregistry.com/forum/...ead.php?t=6320 Either way I suggest you replace the coil packs as your in for a plenum pull anyway. I bought set of 4 off of Ebay last year for $150. Easiest way is to see if your throwing some codes on a scanning tool. Did your SES light come on in the DIC?
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GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director ![]() 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 09-23-2008 at 03:27 PM. |
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#3 | |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,152
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__________________
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 |
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#4 |
Join Date: Sep 2006
Location: lone pine and mammoth lakes
Posts: 1,407
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there is another option on injectors ficinjectors, ask for jon bosch type 2 or 3 depending on your year 380 to your door . they are flow mat5ched and have a 3 yr warrenty . i have a set in my 92 and they are awsome .
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#5 | |
![]() ![]() Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Hope I'm wrong 'bout the coolant leaks... Hope it is something simple. P. |
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#6 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,697
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Coolant leak may not be head gasket. Do as Paul suggests and see if
any plugs look wet or washed. Pull plenum. Do coolant pressure check. My leak showed up between IH and cylinder head on #4 primary runner. |
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#7 |
Banned
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Join Date: Oct 2006
Location: MD
Posts: 3,690
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wow....
Thanks for all the info guys! A fellow Z brother is going to help out tomorrow and hopefully figure this out! Awesome info ![]() |
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#8 |
![]() Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,687
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To add some more information. The white "smoke" from the exhaust smelled like raw gasoline. I helped David pull three plugs and they looked fine.
No sign of coolant loss from the expansion tank. When we pulled plug wires, all wires caused the choppy idle to get worse except #1. There was no change in the idle when #1 wire was pulled. The plug wire for #1 when pulled, sparked to the engine with a healthy spark. We plan on doing a fuel leakdown test next. Any other ideas? Jim |
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#9 |
![]() Join Date: Jul 2007
Location: Bartlett, IL
Posts: 7,152
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I am sticking with Injectors as my thought,, my 90 did the SAME thing this past summer
it was injectors
__________________
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 |
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#10 |
![]() ![]() ![]() Join Date: May 2007
Location: Peoria, AZ
Posts: 9,153
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My moneys on Injectors as I originally stated, And I suggest replacing the coils for good measure while under the plenum as stated as well. White smoke is indicative of Raw fuel as well. The additional information of fuel smell as adds weight to my initial conclusion. I would be interested to see what the fuel pressure was like at the rail and how long the pressure holds. That should nail down the injector consensus as well. And rule out fuel pump issues as well. Just a thought. GC
And before Franks RC Injectors slip away again Jim I suggest the owner gets Jiggy wit it pretty darn fast before they are NLA. (you can ask me the story of why they are available again if you wish!) Anddd.. Frank is dontating the cash for those 100% to our injuried Z brother... Which mean to me several things. Frank is a classy guy. ZR-1 Owners rock and I love the brotherhood.
__________________
GOLDCYLON - 91 ZR-1 #2014 GOLDCYLON - 90 ZR-1 #2794, 4L60e (Formerly Schrade's) GOLDCYLON - 11 CTS-V Arizona State Director ![]() 91 WHITE/BLACK #2014. 380 P&P&PCed,Ported Heads, Jeal Long tubes, Corsa Exhaust/FIKSE FM-5s /LED TLs, LED Headlights, Front Wilwood 6 piston narrowlite calipers and rear Wilwood caliper street shop mod,CNCed Coolant Pipes,TPI Cvr,Filter cover,Stainless Bolts, DRM/DOM PROM /ZFDOC mod build #102,DRLs,BMAD with stainless Debris Screen,Coplan Air Blaster, Pioneer APP Radio 4,Brey-Krause HB,Sub Bar,Fire extinguisher seat mount,DRM Coilovers,LEDs everywhere,Compass mirror (orange),V1 DIC hidden display, Homelink sun visor, Carbon Fiber top x3 and APSIS Carbon Fiber interior, APSIS CF Steering Wheel/NAPA Leather, Banski trailing arms, Guldstrand front suspension,urethane bushings from Prothane (total suspension) ZFDoc drive shaft safety loop, raptor shift light (orange),AO engineering louver front plate, Console seat cushion, 96CE seats with black custom Sheepskins, ss billet catch can,Viper remote entry/alarm,Cragar Rear Louvers,LED side louver lights, Dewitts Radiator with SPAL fans and a Woods 160 T-Stat 90 RED/BLACK #2794. 4L60e Automatic Stage V by RPM Transmission, TCI Dedicated TCM, OBX Stainless Headers, Corsa Exhaust, SAN Secondaries and Haibeck PROM, Exotic Muscle Coil overs, LED Interior Lights, LED Tail Lights, LED Headlights, 94 Sport seats with black custom Sheepskins , Cragar rear louvers, GS Front calipers, Banski Trailing arms, APSIS Carbon Fiber steering wheel, Front and Rear Baer Eradispeeds, DRLs, Guldstrand front suspension,urethane bushings from Prothane (total suspension), Dewitt's Raditor with Dual SPAL fans and a Haibeck 170 T-Stat 11 RED/GREY CTS-V Last edited by GOLDCYLON; 09-24-2008 at 08:43 AM. |
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