help..tried everything and car still hard starts

Seavette · May 30, 2024

89 C4 CORVETTE TAKES 8 - 10 CRANKS BEFORE CAR WILL START . SOMETIMES THE BATTERY WILL DIE IF I TRY TOO MUCH.
The car idles fine around 800 and runs amazingly great once started..if it starts.
i have replaced the following...sparkplugs AC DELCO, WIRES,DISTRIBUTOR CAP AND ROTOR, 8 FUEL INJECTORS bOSCH III , FRESH GAS, FUEL PRESSURE REGULATOR, NO VACUUM LEAKS,
THE CAR SMELLS LIKE ITS FLOODED when trying to start sometimes .
fule pump , and prsssure all good, fuses all good
any suggestions?

Seavette · May 31, 2024

I forgot to mention i also replaced the IAC and that did not help...it takes many cranks when cold and even more cranks when hot. it eventually fires up and runs great.
The car is unreliable to take out for a drive and just wont restart without pulling out what ever hair i have left.

Dave91TM · May 31, 2024

Timing?

Murray20c8 · May 31, 2024

Ya, I was going to suggest letting a tuner have a look.

Seavette · Sep 12, 2024

I thought I would comment on a succesful fix on my corvette 89 C4 HARD START.
AFTER REPLACING, 8 fuel injectors , ,WIRES , SPARK PLUGS, IGNTION COIL , Idle control valve and cleaning throttle body nothing worked. Car still had a bad hard start.
My final and succesful cure was the computer. I removed the computer and took it to a guy that fixes radios and tvs had him open it and check out all the resistors , solders, capacitors etc . He found a few bad capaictors and resitors..replaced with new ones and all worked great. Car starts everytime now!

Murray20c8 · Sep 12, 2024

Seavette said:
I thought I would comment on a succesful fix on my corvette 89 C4 HARD START.
AFTER REPLACING, 8 fuel injectors , ,WIRES , SPARK PLUGS, IGNTION COIL , Idle control valve and cleaning throttle body nothing worked. Car still had a bad hard start.
My final and succesful cure was the computer. I removed the computer and took it to a guy that fixes radios and tvs had him open it and check out all the resistors , solders, capacitors etc . He found a few bad capaictors and resitors..replaced with new ones and all worked great. Car starts everytime now!

Cool! Thanks for the update! Glad you got it sorted out!

Godabitibi · Sep 17, 2024

Thief deterant system. Keypass. Buy a cheap module and bypass it. I had a very similar proplem and that was the problem.

GM VATS

timers.shop

Godabitibi · Sep 17, 2024

Sorry I didn't see you solved it !

Dave91TM · Sep 18, 2024

Seavette said:
I thought I would comment on a succesful fix on my corvette 89 C4 HARD START.
AFTER REPLACING, 8 fuel injectors , ,WIRES , SPARK PLUGS, IGNTION COIL , Idle control valve and cleaning throttle body nothing worked. Car still had a bad hard start.
My final and succesful cure was the computer. I removed the computer and took it to a guy that fixes radios and tvs had him open it and check out all the resistors , solders, capacitors etc . He found a few bad capaictors and resitors..replaced with new ones and all worked great. Car starts everytime now!

Glad you solved it. Mines been in the shop for 3 weeks now trying to sort out a rough running issue. I hope to get it back this Friday I'll post my tale of woe then.

help..tried everything and car still hard starts

Seavette

Seavette

Dave91TM

Murray20c8

Raccoon hunter

Seavette

Murray20c8

Raccoon hunter

Godabitibi

Anything with an engine

GM VATS

Godabitibi

Anything with an engine

Dave91TM

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