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420A Pls help no start after transmission swap

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leo velez

Probationary Member
5
0
May 25, 2026
Oahu, Hawaii
So I own a 99 gs car cranks I have spark 50 psi on the rail but won’t run starts on starter fluid but stall out after I have switched the asd, crankshaft sensor car ran 3 months ago but after a transmission swap it won’t start
 
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leo velez said:
So I own a 99 gs car cranks I have spark 50 psi on the rail but won’t run starts on starter fluid but stall out after I have switched the asd, crankshaft sensor car ran 3 months ago but after a transmission swap it won’t start
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Sounds like the injectors arent firing. I’m not too familiar with the 420a but I’d be checking all plugs you removed while doing the transmissions swap.
 
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Turbski91 said:
Sounds like the injectors arent firing. I’m not too familiar with the 420a but I’d be checking all plugs you removed while doing the transmissions swap.
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My buddy is the one that swapped the transmission he said all plugs are good
 
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Also check firing order. I know its a no brainer, but sometimes the smallest thing is the culprit. Make sure you ARE GETTING SPARK. Good grounds to the engine are super important too. Just tips.
 
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If your is automatic follow negative battery cable to the starter there should a ground washer 14mm bolt attaches to the bellhousing could be same for the manual transmission too..
But also I would change fuel filter too, clogged dirty fuel filter will hard starting issues too
 
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dalesmitsu said:
If your is automatic follow negative battery cable to the starter there should a ground washer 14mm bolt attaches to the bellhousing could be same for the manual transmission too..
But also I would change fuel filter too, clogged dirty fuel filter will hard starting issues too
Click to expand...
Will definitely give this I try
 
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1990TSIAWDTALON said:
Also check firing order. I know it’s a no brainer, but sometimes the smallest thing is the culprit. Make sure you ARE GETTING SPARK. Good grounds to the engine are super important too. Just tips.
Click to expand...
I am getting spark it’s the injector plug that reads low Volts
 
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Do you have a spare injector pack.??
IIRC, that plug can be interchanged with one other. Make sure it is the correct one. 🤞
 
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