Fresh Engine Start Woes.... GRRRR!

N

nitrous21

New Member

Aug 23, 2007

9

0

1

Mar 17, 2008

#1

• Mar 17, 2008

• #1

Let me start off with this: GRRRRRRRRRRRRRRRRRRR!

Alright, now to my situation.
Im a first timer when it comes to building a motor, but I have been around cars my whole life, so I do alright most of the time. The motor is an ealry 70's 351 cleveland that has been stroked to a 385 with a fairly aggressive cam. The heads are stock 2v, fully port matched with the intake. I am running a full msd setup (6al, 8.8mm wires, blaster 2 coil). I am very confident in all my wiring as I have checked and rechecked it. Also, I know my firing order is correct because I went through that 5 times already. The motor is getting fuel and spark, so here is whats happening.
When I go to start it, I will get I pop, and thats it. Then I just get the cranking noise. Every time I try, I get one pop-like backfire noise and thats it, only 1. On occasion there will be a little fire coming up through the carb, but nuthin serious.

So whats my problem, what did I do wrong?

If there is more info needed before we can determine the problem please let me know and I will try my best to inform.

Thanks sooo much in advance, I really really want to get this thing started!


Marc

 

Edbert

Founding Member

Jul 13, 2002

3,548

32

109

Austin TX

Mar 17, 2008

#2

• Mar 17, 2008

• #2

Are you 100% sure you stabbed the distro when you were at TDC on the compression stroke?

If so my next guess is that you need to dial in more advance. Try rotating it while it is cranking.

 

jcode68

Active Member

Jul 15, 2003

892

1

29

Massachussetts

Mar 17, 2008

#3

• Mar 17, 2008

• #3

I agree, sounds liek your distributor is 180 degrees out. Double check your distributor.

 

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Maxamil

Founding Member

Feb 14, 2001

479

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16

Fresno, Cali

Mar 17, 2008

#4

• Mar 17, 2008

• #4

I also agree on the timing. Sounds like you are 180 degrees out.

 

I

iapexl8r

Member

Apr 1, 2005

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Mar 17, 2008

#5

• Mar 17, 2008

• #5

#1 cyl is on the pass side in front. also your firing order is dictated by the camshaft, if your dist is stabbed correctly; with #1 cyl at top dead center on the compression stroke, the harmonic ballancer should be @ 0 tdc on the timing pointer. the rotor (under the dist cap) should point to the # 1 cyl spark plug wire.
If your # 1 cyl doesnt make compression when the timing mark goes by 0tdc (it will go by twice one should have compression) your timing chain could be on wrong ususlly people set it up to the chevy #1 on the driver side. good luck chris

 

woodsnake

15 Year Member

Jan 16, 2007

1,352

15

69

Hicksville, NY

Mar 18, 2008

#6

• Mar 18, 2008

• #6

Back firing=== timing.

 

N

nitrous21

New Member

Aug 23, 2007

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1

Mar 19, 2008

#7

• Mar 19, 2008

• #7

Alright stangnetters... I am off from school and work friday, so my day will be spent starting my car. I will keep ya updated!

 

M

mikethebike

Member

Jun 12, 2007

358

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17

Greenville, SC

Mar 19, 2008

#8

• Mar 19, 2008

• #8

Maxamil said:

I also agree on the timing. Sounds like you are 180 degrees out.

Click to expand...

Would't that be 360 degrees out since it takes 720 degrees of crank rotation to get from tdc on compression back to tdc on compression And 360 degrees of crank rotation to go from tdc at comporession to tdc at exhaust?

 

BarnStang

Founding Member

Mar 2, 2001

1,260

3

39

Hagerstown, MD

Mar 19, 2008

#9

• Mar 19, 2008

• #9

I think he is refering to 180 out on the distributer...

 

Edbert

Founding Member

Jul 13, 2002

3,548

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Austin TX

Mar 19, 2008

#10

• Mar 19, 2008

• #10

180 degrees of cam rotation (which drives the distro) not crank rotation.

 

SoCalCruising

Founding Member

Jul 25, 2000

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47

SoCal

Mar 19, 2008

#11

• Mar 19, 2008

• #11

Yeah, get the dizzy in right, then (if it is) add advance. If you have a remote starter, then try adding it while cranking.

 

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mikethebike

Member

Jun 12, 2007

358

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17

Greenville, SC

Mar 19, 2008

#12

• Mar 19, 2008

• #12

Edbert said:

180 degrees of cam rotation (which drives the distro) not crank rotation.

Click to expand...

Gee, I didn't know that the cam drove the distributor. After all the decades, imagine that.
And I always thought we spoke of degrees in crankshat degrees not camshaft degrees. You know...like 12 degrees advance (on a mechanical H-P 289 dual-point)...not 6 degrees advance.

 

Edbert

Founding Member

Jul 13, 2002

3,548

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109

Austin TX

Mar 20, 2008

#13

• Mar 20, 2008

• #13

Are you trying to be sarcastic on purpose or are you just dense from birth?

That is not intended as an insult, but after reading your posts in this thread and others over the last few days I really can't tell.

 

D

D.Hearne

New Member

Sep 29, 2000

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south louisiana

Mar 20, 2008

#14

• Mar 20, 2008

• #14

mikethebike said:

Would't that be 360 degrees out since it takes 720 degrees of crank rotation to get from tdc on compression back to tdc on compression And 360 degrees of crank rotation to go from tdc at comporession to tdc at exhaust?

Click to expand...

You must be the ONLY one who thinks if it in this way. EVERYBODY else refers to this as being 180* off.