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11-02-2010, 04:10 PM
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#1 | |
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AF Regular
Join Date: Feb 2004
Location: Mooreland, Oklahoma
Posts: 172
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Very Hard to Start
1998 T100 3.4L 254K++++++
Plugs, wires, and fuel filter are OK The truck turns over fine and trys to start but then immediately dies. I have to keep the started engaged for several more seconds to get it to start. Once started, it will only idle very rough. After about 30 seconds of this chugging, it will smooth out and it can be reved to 5000 rpm without any problems. It seems that the longer it sits, the harder it is to get started but only when engine is cold. When engine is warm, it starts great. Any suggestions would be greatly appreciated. Thanks! Last edited by OSUCowboy27; 11-02-2010 at 04:17 PM. Reason: added detail |
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11-03-2010, 02:14 PM
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#2 | |
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AF -Advisor
Join Date: May 2005
Location: the Socialist State of, Maryland
Posts: 1,005
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Re: Very Hard to Start
Start by seeing if any CEL error codes have been generated. Most parts stores will do it for free.
Then look at the cold start injector circuit and the fuel pump as possibilities.
__________________
84 4Runner - ARBed 5.29s F&R, 4.7 & 2.28 t-cases, Chevys, AP x-over, BudBuilt x-member, 2" drv trn lift, 36" TSLs, 30 spline Longs 80 something p/u - Buick 231 V6/TH-350 trans, Holley 4 bbl, Weiand intake, dual batts, dual tanks ... 89 4Runner - stock 2000 Isuzu Trooper + 2010 Sonata |
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11-03-2010, 03:29 PM
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#3 | |
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The RustBuster
 
Join Date: Feb 2006
Location: La Plata, Maryland
Posts: 2,290
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Re: Very Hard to Start
Hard starting when cold usually points to a clogged/sticking EGR or IAC valve, or may be a faulty coolant temperature sensor. Check these out along with the any stored trouble codes and post back with your findings.
__________________
Current Garage: 2009 Honda CR-V EX 2006 Mazda 3i 2004 Chevrolet Silverado 2500HD 2003 GMC Envoy XL 2000 Honda ST1100 2000 Pontiac Sunfire Vehicle History: 2003 Pontiac Vibe AWD - 1999 Acura Integra GS - 2004 4.7L Dakota Quad Cab 4x4 - 1996 GMC Jimmy 4wd - 1995 Chevrolet C2500 - 1992 Toyota Camry LE 2.2L - 1992 Chevrolet S10 Ext. Cab 4.3L - 1995 Honda ST1100 - 1980 Yamaha XS400 - 1980 Mercury Bobcat. |
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11-03-2010, 07:45 PM
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#4 | |
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AF Regular
Thread starter
Join Date: Feb 2004
Location: Mooreland, Oklahoma
Posts: 172
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Re: Very Hard to Start
There aren't any codes. I will check the the coolant temp sensor and see if a shot of starting fluid helps it start.
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09-04-2011, 11:04 AM
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#5 | |
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AF Regular
Thread starter
Join Date: Feb 2004
Location: Mooreland, Oklahoma
Posts: 172
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Re: Very Hard to Start
Update
Well, it started missing all the time several months ago without recording any codes. I put the code reader on it yesterday and it showed a miss on #1 and #4. I am thinking that the problem is with coil since it is the only thing in common with both cyliders. I swapped it with another coil to see if the computer records a miss in 2 different cyliders. |
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