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94 j-30 idles rough on start up. rpms fluckuate up and down and will die if i dont put it into nuetral at a lite and rev it. then it runs like its missing. later it will run great. have replaced crank sensor, plugs, fuel pump, fuel and air filters, belts, and battery. sometimes at higher speeds it jerks like its missing then it goes away.

Submitted: 181 days and 7 hours ago.

Category: Car

Value: $15

Status: CLOSED

1994 Infiniti j-30

Already Tried:
plugs- crank sensor- filters -fuel pump-belts-battery

Posted by rashawn 181 days and 7 hours ago.

Answer

1st clean your throttle body to help the idle maintain steady, carb and choke cleaner is ok. Has this car been sitting up for a while? is this miss a bonafied skip?

181 days and 6 hours ago.

Reply

it has not sat up. i run it every day sometimes at over 100 mph. i have been putting additives--gas dryer,injector cleaner,lucas conditioner,sea foam the last mounth or so

Accepted Answer

Okay . I have a 300zx same engine same deal. I havent driven it in years same ish! Injectors are sticking. two options keep driving until they unstick. or replace them. I know on the j30 they are a little hard to get to. but that is the prob.

Accepts:
Expert:	rashawn
Pos. Feedback:	93.9 %
Answered:	5/25/2009

ASE Certified Technician

20 years in the industry A.S.E. master certified

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1994 Infiniti j-30

Already Tried:
plugs- crank sensor- filters -fuel pump-belts-battery

Answer

1st clean your throttle body to help the idle maintain steady, carb and choke cleaner is ok. Has this car been sitting up for a while? is this miss a bonafied skip?

Reply

it has not sat up. i run it every day sometimes at over 100 mph. i have been putting additives--gas dryer,injector cleaner,lucas conditioner,sea foam the last mounth or so

Accepted Answer

Okay . I have a 300zx same engine same deal. I havent driven it in years same ish! Injectors are sticking. two options keep driving until they unstick. or replace them. I know on the j30 they are a little hard to get to. but that is the prob.

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Question

Optional Information

1994 Infiniti j-30 Already Tried: plugs- crank sensor- filters -fuel pump-belts-battery

Answer

1st clean your throttle body to help the idle maintain steady, carb and choke cleaner is ok. Has this car been sitting up for a while? is this miss a bonafied skip?

Reply

it has not sat up. i run it every day sometimes at over 100 mph. i have been putting additives--gas dryer,injector cleaner,lucas conditioner,sea foam the last mounth or so

Accepted Answer

Okay . I have a 300zx same engine same deal. I havent driven it in years same ish! Injectors are sticking. two options keep driving until they unstick. or replace them. I know on the j30 they are a little hard to get to. but that is the prob.

Related Car Questions

1994 Infiniti j-30

Already Tried:
plugs- crank sensor- filters -fuel pump-belts-battery