wet motor - ZR-1 Net Registry Forums

marvind · 11-06-2014

Took my car to have it detailed and specifically told them not to pressure wash the engine, they did anyways. Now it has a misfire in it under power, at idle its fine. The miss isn't constant its intermittent. Any ideas on where to start? Its a 91, and there are no check engine lights on.

Kevin · 11-06-2014

coil packs, injectors, vac leak, either way sounds like they need to pony up for some parts.

mike100 · 11-06-2014

pull the spark plug boots to see if there's water in the spark plug holes- that might be all it is.

Dynomite · 11-06-2014

Quote:

Originally Posted by marvind

Took my car to have it detailed and specifically told them not to pressure wash the engine, they did anyways. Now it has a misfire in it under power, at idle its fine. The miss isn't constant its intermittent. Any ideas on where to start? Its a 91, and there are no check engine lights on.

Pressure washing the engine in addition to flooding the starter may alter the Electrical Connectors and/or upset vacuum line connectors. Let the engine just sit for a day or two to dry out (or run it as engine heat will dry it out faster). The MAPS connections for example could have been disconnected by the water pressure.

Inspect each spark plug hole for moisture as mike100 suggests. Leave the plug boots out of the holes for a few hours to dry out just in case.

GOLDCYLON · 11-06-2014

What Cliff posted above

cvette98pacecar · 11-06-2014

If you have a wet dry vac try to suck out as much of the water as you can. Than change the port to exhaust and blow out the area's under the plenum where you can get the nozzle in the openings.

If you have access to a blow gun and a compressor blow out as much water as you can.

Additionally take some small caps and fill them half way up with salt and strategically place them in the engine compartment to absorb the moisture.

diamond zr1 · 11-07-2014

most any Cabellas and even k mart sells dehumidifying kits,used in gun safes etc. much better then salt/as Robert says get as much out the easy way/blowing etc. 1st/I also use a halogen or heat light/

phrogs · 11-07-2014

park it and let it dry.

I have sprayed my motor to clean it before but I also let it sit for a while afterwards.

11-06-2014	#1
marvind Join Date: Oct 2014 Location: tampa FL. Posts: 1	wet motor Took my car to have it detailed and specifically told them not to pressure wash the engine, they did anyways. Now it has a misfire in it under power, at idle its fine. The miss isn't constant its intermittent. Any ideas on where to start? Its a 91, and there are no check engine lights on.

11-06-2014	#2
Kevin Join Date: Jun 2005 Location: pittsburgh Posts: 4,632	Re: wet motor coil packs, injectors, vac leak, either way sounds like they need to pony up for some parts. __________________ It's not the car, it's the people - Doug Johnson 90 r/r "KEYS ON" nick named "T.L.B"

11-06-2014	#3
mike100 Join Date: Feb 2011 Location: San Marcos CA Posts: 1,802	Re: wet motor pull the spark plug boots to see if there's water in the spark plug holes- that might be all it is.

11-06-2014	#5
GOLDCYLON Join Date: May 2007 Location: Peoria, AZ Posts: 9,155	Re: wet motor What Cliff posted above __________________ 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

11-06-2014	#6
cvette98pacecar Join Date: May 2011 Location: Sydney, Australia Posts: 2,479	Re: wet motor If you have a wet dry vac try to suck out as much of the water as you can. Than change the port to exhaust and blow out the area's under the plenum where you can get the nozzle in the openings. If you have access to a blow gun and a compressor blow out as much water as you can. Additionally take some small caps and fill them half way up with salt and strategically place them in the engine compartment to absorb the moisture. __________________ Robert J. DeMarco [SIGPIC][/SIGPIC] [COLOR=blue]G[/COLOR][COLOR=red]rand[/COLOR] [COLOR=blue]S[/COLOR][COLOR=red]port[/COLOR] Registry Lifetime Member NCM Lifetime Member #2655 Pacecar Registry Member [COLOR=red]ZOOM Charter Member - ZR-1 Owners of Michigan[/COLOR] [COLOR=plum][I]ZR-1[/I] Registry member since 2012 [/COLOR] [COLOR=black]1990 LPE "368" Aerobody ZR-1, Last ZR-1 built by John[/COLOR] 1991 Callaway Aerobody ZR-1, DRM 500 1991 Shinoda Aerobody Spyder, 1998 Pace Car

11-07-2014	#7
diamond zr1 Join Date: Sep 2006 Location: diamond lake /washington Posts: 223	Re: wet motor most any Cabellas and even k mart sells dehumidifying kits,used in gun safes etc. much better then salt/as Robert says get as much out the easy way/blowing etc. 1st/I also use a halogen or heat light/

11-07-2014	#8
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,753	Re: wet motor park it and let it dry. I have sprayed my motor to clean it before but I also let it sit for a while afterwards. __________________ JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything.