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93 gmc jimmy new ecm still flashing code 43 got gas and

Customer Question
spark why wont it start...
93 gmc jimmy new ecm still flashing code 43 got gas and spark why wont it start
Submitted: 2 years ago.Category: GMC
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Answered in 1 hour by:
10/28/2015
GMC Mechanic: K. Wiggins, ASE Certified Technician replied 2 years ago
K. Wiggins
K. Wiggins, ASE Certified Technician
Category: GMC
Satisfied Customers: 3,128
Experience: ASE Certified Technician, Associates Degree in Automotive Technology, 15+ years in the trade
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Hello, could you give me the 8th VIN character?

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Customer reply replied 2 years ago
w
GMC Mechanic: K. Wiggins, ASE Certified Technician replied 2 years ago

Thanks, ***** ***** transfer the old PROM over to the new computer? Also have you ran through a check like the one below?

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Customer reply replied 2 years ago
transferred old prom will do check now
GMC Mechanic: K. Wiggins, ASE Certified Technician replied 2 years ago

Sounds good, I'll be stepping out for about an hour or so but will reply ASAP

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Customer reply replied 2 years ago
new knock sensor still will not start
GMC Mechanic: K. Wiggins, ASE Certified Technician replied 2 years ago

I'm going to opt out so you can get a second opinion, but in the past I have actually seen the prom itself be bad and cause this, hence my asking. GM issued a TSB about it back during that era.

Someone should be with you shortly to offer a second opinion.

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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 2 years ago
Tims Auto Repair
Tims Auto Repair, GMC Mechanic
Category: GMC
Satisfied Customers: 16,171
Experience: have owned a repair shop for 25 years
Verified

Hi, My name is ***** ***** for the delay.

I will do my best to assist you

tell me,,will it fire with a prime?with starting fluid or a little fuel into the throttle body?

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Customer reply replied 2 years ago
will fire with starting fluid
GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 2 years ago

ok,,if it is firing with starting fluid,you arent getting fuel into the cylinders,

the first thing you need to do is to check the fuel pressure, these must have no less than 60psi at all times .anything less than 55psi wont go through the poppet injectors.

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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 2 years ago

if the fuel pressure is good,then the problem may be that you have no fuel injector pulse,this can be caused by a bad ignition module or a bad crank sensor

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GMC Mechanic: Tims Auto Repair, GMC Mechanic replied 2 years ago

If you are satisfied with my answer, Please Rate my answer by clicking the rating button so I can get credit for my work. I’m not always going to be giving you good news, so please don't let this stand in the way of you accepting my answer. .it does not cost you more money and we will still be able to communicate, ,.please understand, i can not see, hear or touch the vehicle and only know what you tell me. Bonuses and positive feedback are appreciated.. if you are not satisfied with my answer, please do not leave bad feedback ,i will gladly opt out and let another expert handle the question. .if i have sent any diagrams, please print them. .sometimes you may need to right click the image [,then save picture as]to save it to your computer so you can open it with your picture program...Please ask if you need more help.

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Customer reply replied 2 years ago
just got back good fuel pressure changed ign module willnot fire runs good on ether any other ideas
Customer reply replied 2 years ago
new distributor still not starting
Customer reply replied 2 years ago
anybody got any answers
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Tims Auto Repair
Tims Auto Repair
Tims Auto Repair, GMC Mechanic
Category: GMC
Satisfied Customers: 16,171
16,171 Satisfied Customers
Experience: have owned a repair shop for 25 years

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