S14a running bad - Urgent help needed

[danielonline]

Hi all.

I have a s14a which has got a running issue.

The car misfires when driving and the car struggles to get up revs or get past 30 mph.

The car just had a engine swap at the garage for a s14 engine which was running great in last car. Sadly I ran out of time so had to remove the car to get it on the road but now I have this issue to sort!

Old engine was running split fires and z32 as setup was extensive but garage put setup back to stock. Also had to swap a couple of bits over due to s14 engine components being different.

I have tried changing the maf and the amplifier.

How long does fuel last? It's been sitting for 6+ months.

[danielonline]

Any help would be great

[turbokid]

im no mechanic, but maybe a vacuum leak? could also be fuel pump or fpr?

[kingk]

If you’ve swapped out maf from a z32 etc did you change the ecu back to standard or have the map changed?


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[Chriscooke]

Coil pack loom earthed at the back of the block? Checked your plugs?

[Mike41288]

If it had a z32, it must have been mapped for it. If you swapped back to a stock maf without remapping then the fueling will be off?

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[Chriscooke]

If it’s using the ecu from before then yeah it’ll be off. Op said it’s all gone to a stock set up.

[danielonline]

Ecu is standard now

[Chriscooke]

Could be the knock sensor I guess.

Does the car rev freely out of gear but struggle when moving?

[danielonline]

Yeah correct

[Chriscooke]

Sounds coilpack or plug related to me then tbh.

[sideways14a]

Boost leak, mainly cos i aint said that in a while.

[baileypoole_]

Sounds coilpack or plug related to me then tbh.

^^this


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[danielonline]

All sorted Turned out to be a faulty maf (2 of them)

My thanks to everyone who helped especially James who let me have use of his parts