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 > Gas MH won't start. Need help

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lg212

Hot Springs, AR USA

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Posted: 03/13/18 10:52am Link  |  Quote  |  Print  |  Notify Moderator

Have mid 90's gas MH with 454 Chevy that won't start. It cranks good but doesn't start, no fire. Have replaced the coil, module, distributor cap and rotor. It has been suggested that it might be the pick-up coil in the distributor and we should get a new distributor.
Need suggestions other than a new MH


Leo & Danella, Katie the Shih-tzu and Bailey the Welch Corgi
34' Allegro Bay w/slide
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Hot Springs, AR


ksg5000

Oregon

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Posted: 03/13/18 11:07am Link  |  Quote  |  Print  |  Notify Moderator

Is it getting fuel? Older rigs have fuel pump and fuel filter issues.


Kevin

rgatijnet1

Florida

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Posted: 03/13/18 11:10am Link  |  Quote  |  Print  |  Notify Moderator

You might try using an OBDII meter to see if any fault codes are showing. I believe that you have both cam and crank position sensors that can fail.

lg212

Hot Springs, AR USA

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Posted: 03/13/18 11:11am Link  |  Quote  |  Print  |  Notify Moderator

Seems to be getting fuel. Tried starting fluid but no luck.
Thank you

donn0128

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Posted: 03/13/18 11:15am Link  |  Quote  |  Print  |  Notify Moderator

Do you have spark? Its easy enough to check. Throwing parts at the problem is not the way to go about it.
An internal combustion engine needs two things, fuel and spark. No fire means one is likely missing.


Don,Lorri,and Charlie Bear 2016
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midnightsadie

ohio

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Posted: 03/13/18 11:29am Link  |  Quote  |  Print  |  Notify Moderator

X2 stop throwing money at it, #1 you have to have spark # 2 must prove you have fuel.

DrewE

Vermont

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Posted: 03/13/18 11:37am Link  |  Quote  |  Print  |  Notify Moderator

midnightsadie wrote:

X2 stop throwing money at it, #1 you have to have spark # 2 must prove you have fuel.


#3, once you know you have spark and fuel, the two must be timed properly in relation to each other and the engine internals. Are the wires correctly put on the distributor terminals? Is the timing belt/chain set properly (and unbroken)?

There's really not much else that can keep a gas engine from running at all.





1995brave

San Antonio, TX

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Posted: 03/13/18 12:02pm Link  |  Quote  |  Print  |  Notify Moderator

Was any work done to it before you tried to start it? Check your wiring, mice or squirrels could have chewed them. Check for voltage at the connector for the distributer should have 12volts, if not check your ignition switch.

Sam Spade

North Central Florida

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Posted: 03/13/18 12:26pm Link  |  Quote  |  Print  |  Notify Moderator

lg212 wrote:


Need suggestions other than a new MH


Have you considered PAYING an experienced mechanic for his expertise ?? That might be cheaper in the long run.


'07 Damon Outlaw 3611
CanAm Spyder in the "trunk"

Matt_Colie

Southeast Michigan

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Posted: 03/13/18 12:39pm Link  |  Quote  |  Print  |  Notify Moderator

LG,

You have lots of good responses here. While some may be better than others, they all have one thing in common. Do the diagnostics. Always start with the basics.

You say you tried starting fluid. (I have seen so many good engines destroyed with that stuff that we don't even have in our our shelves.)

Did you actually check for spark?
Like pull a wire (you can't pull the coil wire, it doesn't have one), put a phillips screwdriver in the boot and hold it near metal - like 1/4" - and crank? If you can't see a good hot spark, find out why. In the GM books, there is a diagnostic tree for HEI.

If you do have good spark, now take you timing light. (If you have an engine with a distributor, you should have at least access to a timing light.) And hook it to any plug. Open the airfilter housing and point it at the injector body. When you crank, there should be fuel coming out of one of the injectors. If you move the pickup to the next plug in the order you should now see fuel from the other.

If that all works as it should, you may have much bigger problems than you can fix in the driveway.

Matt - a refugee from the Detroit engine labs


Matt & Mary Colie
A sailor, his bride and their black dogs going to see some dry places that have Geocaches in a coach made the year we married.


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